HomeMy WebLinkAboutNEW - 2017CollisionAnalysis - Jan19
City of Iowa City
Traffic Collision Analysis
2015-2017
Analysis Completed By:
Emily Bothell, Senior Transportation Engineering Planner
Nate Bauer, Transportation Planning Intern
January 2019
Table of Contents
Introduction 1
Evaluation Process, Inputs and Weighted Formula 1
Intersection Evaluation 2
Intersection Assumptions 2
Top 10 Intersection Collision Locations 3
Top 10 Intersection Collision Locations by Quadrant 4
2013-2015 / 2015-2017 Collision Comparison 6
Intersection Capital Improvement Program Projects 7
Mid-Block Evaluation 8
Mid-Block Assumptions 8
Top 5 Mid-Block Collision Locations 8
Top 5 Mid-Block Collision Locations by Quadrant 10
2013-2015 / 2015-2017 Collision Comparison 11
Mid-Block Capital Improvement Program Projects 13
Potential Countermeasures 14
Per Capita Collision Comparisons 17
Complete Intersection Ranking 18
Complete Mid-Block Ranking 22
1
Introduction
This report identifies high collision locations in Iowa City for the years 2015 through 2017. The goal of this
report is to increase awareness of high collision locations. As a result, Iowa City will be able to identify and
implement countermeasures designed to reduce collisions at these locations. The previous collision study
analyzed collisions between years 2013 and 2015, which will be compared to the collisions that occurred
between 2015 and 2017.
The data used in this report was sourced from the Iowa Department of Transportation (Iowa DOT). The Iowa
DOT obtains copies of collision reports from local jurisdictions to compile a database called the Iowa Crash
Analysis Tool. This report utilizes the most complete and current data available from the Iowa DOT for the
years 2015 through 2017.
Evaluation Process
Collision frequency was summarized for all intersection and mid-block locations in Iowa City. Locations with
three or more collisions were evaluated for this report. The total number of intersection locations (locations
with three or more collisions) within the Iowa City area is 171. The total number of mid-block collision locations
(locations with three or more collisions) is 64. Each location is ranked using the Iowa DOT Office of Traffic
Safety weighted formula. The formula has three data inputs: number of collisions (weighted at 25%), crash rate
(weighted at 25%), and severity of the collisions (weighted at 50%). The three inputs are explained in more
detail below.
Inputs
1. Number of collisions – This is the total number of collisions per location obtained from the Iowa Crash
Analysis Tool during the years 2015-2017. Based on the number of collisions, each location was given
a score. Scores are assigned as shown in Table 1.
2. Crash Rate – This is the total number of collisions per one-million vehicles divided by the total number
of days per Annual Average Daily Traffic (AADT). Crash rates allow each intersection to be evaluated
with a common denominator. The crash rate is then assigned a corresponding score as shown in Table
1.
Intersection crash rate formula: (# Collisions) * (1,000,000)
(# Days) * (Total entering AADT)
Mid-block crash rate formula: (# Collisions) * (1,000,000)
(# Days) * (Total AADT) * (segment length in miles)
3. Severity – This is the combined severity of all collisions per location. Collisions are categorized by:
property damage only, possible/unknown personal injury, minor personal injury, major personal injury,
and fatality. These types of collisions are given a weight of 1, 1, 3, 5, and 12, respectively, and then
totaled to give each location a severity raw score. These raw scores are then converted to a total
severity score as shown in Table 1.
Weighted Formula
After points are assigned for the three categories, the points are entered into the Iowa DOT weighted ranking
formula and organized from highest to lowest rank as shown on Pages 18-23.
Formula: (Collision Points * 0.25) + (Crash Rate Points * 0.25) + (Severity Points * 0.5)
2
Table 1: Iowa DOT Evaluation Criteria and Associated Points
Assumptions
The following assumptions were made for collisions occurring at intersections:
• Collisions occurring within 250 feet (+/- 50) feet from the intersection of streets will be included.
• Sideswipes involving Failure to Yield (FTY) will be included, whereas sideswipes for vehicles traveling
the same direction will not be included (i.e. changing lanes, hitting a parked car).
• If the data record is incomplete regarding the manner of the crash, but still involves two vehicles, it will
be counted.
• If the roadway type is a commercial/residential drive, the crash will not be counted.
• If the roadway type is a non-intersection but the manner of the crash is likely caused by the intersection
(i.e. rear-end) the crash will be counted.
• Collisions involving one vehicle will be counted, assuming the accident was most likely caused by the
intersection.
Top 10 Intersections
Figure 1 displays the top ten intersections in Iowa City, between 2015 and 2017, with the highest combined
score after taking into account the number of collisions, crash rate, and severity of collisions. Three of the ten
intersections are located on Riverside Drive and four are sited along the Hwy 1/ Hwy 6 corridor. As shown in
Table 2, the intersections of E Burlington Street/ S Gilbert Street and S Riverside Drive/ W Benton Street are
both ranked sixth as they have the same combined score of 9.25. Similarly, the intersections of Riverside
Drive/ Hwy 1 and Hwy 6, Hwy 1/ Mormon Trek Boulevard, and Madison Street/ W Burlington Street are all
ranked eighth with a combined score of 8.75.
Evaluation Points
Number of Collisions Crash Rate Severity
Collisions Points Rate Points Raw Score Points
>29 15 >3.5 15 >56 15
27-28 14 3.26-3.5 14 53-56 14
25-26 13 3.01-3.25 13 49-52 13
23-24 12 2.76-3.0 12 45-48 12
21-22 11 2.51-2.75 11 41-44 11
19-20 10 2.26-2.5 10 37-40 10
17-18 9 2.01-2.25 9 33-36 9
15-16 8 1.76-2.0 8 29-32 8
13-14 7 1.51-1.75 7 25-28 7
11-12 6 1.26-1.5 6 21-24 6
9-10 5 1.01-1.25 5 17-20 5
7-8 4 0.76-1.0 4 13-16 4
5-6 3 0.51-0.75 3 9-12 3
4 2 0.26-0.5 2 5-8 2
3 1 <0.25 1 <5 1
Intersection Evaluation
3
Ten Highest Ranking Intersections
ID Intersection Location Intersection Rank
1 Sycamore St. and Hwy 6 1
2 S Gilbert St. and Hwy 6 2
3 Boyrum St. and Hwy 6 3
4 Melrose Ave. and Mormon Trek Blvd. 4
5 Riverside Dr. and W Burlington St. / Grand Ave. 5
6 E Burlington St. and S Gilbert St. 6
7 S Riverside Dr. and W Benton St. 6
8 Riverside Dr. and Hwy 1 / Hwy 6 8
9 Hwy 1 and Mormon Trek Blvd. 8
10 Madison St. and W Burlington St. 8
Table 2: Top 10 Intersection Collision Locations
Riverside Dr. / Hwy 1/6
Figure 1: Top 10 Intersection Collision Locations
4
Top 10 Intersection Collision Locations by Quadrant
In order to further evaluate the types of intersections with high collision/crash/severity rates, the City was
divided into four quadrants defined by major arterials (Dubuque Street, Gilbert Street, Melrose Avenue,
Burlington Street and Court Street). Figure 2 and Tables 3 and 4 display the top ten intersections with the
highest combined score by quadrant.
When analyzing the collisions by quadrant, it becomes evident that a majority of intersections with the highest
combined score are located along major corridors or at intersections with higher volumes.
The highest-ranking intersections in Quadrant 1 are primarily located along Melrose Avenue and Dubuque
Street. In Quadrant 2 the highest collision locations are situated along Burlington Street and in downtown Iowa
City. The majority of intersections with the highest -ranking collisions in Quadrant 3 are located along the
Highway 6 corridor. Lastly, in Quadrant 4 the highest-ranking intersections are situated along Highway 1.
Figure 2: Top 10 Intersection Collision Locations by Quadrant
Q1
Q2
Q3
Q4
5
Ten Highest Ranking Intersections by Quadrant
Intersection
Rank
Quadrant
1 2
West of Dubuque St. & North of Melrose Ave East of Dubuque St. & North of Burlington St./Court St.
1 Camp Cardinal Blvd. and Melrose Ave. Gilbert St. and Burlington St.
2 Kennedy Pkwy. And Melrose Ave. Iowa Ave. and Van Buren St.
3 Galway Dr. and Melrose Ave. Dodge St. and E Burlington St.
4 Dublin Dr. and Melrose Ave. Dodge St. and Iowa Ave.
5 Hawkeye Park Rd. and Melrose Ave. Governor St. and Iowa Ave.
6 Melrose Ave. and Westwinds Dr. E Jefferson St. and N Gilbert St.
7 Melrose Ave. and Mormon Trek Blvd. E Court St. and S 1st Ave.
8 Bartlett Rd. and Mormon Trek Blvd. E Market St. and N Linn St.
9 Cameron Way and Mormon Trek Blvd. N Scott Blvd. and Rochester Ave.
10 Mormon Trek Blvd. and Westwinds Dr. E Market St. and Johnson St.
Ten Highest Ranking Intersections by Quadrant
Intersection
Rank
Quadrant
3 4
East of Gilbert St. & South of
Burlington St./Court St. West of Gilbert St. & South of Melrose Ave
1 Hwy 6 and Sycamore St. S Gilbert St. and Hwy 6
2 Hwy 6 and Boyrum St. S Riverside Dr. and W Benton St.
3 S 1st Ave. and Hwy 6 Hwy 1 and Mormon Trek Blvd.
4 Keokuk St. and Hwy 6 Hwy 1 and Hwy 6
5 Fair Meadows Blvd. and Hwy 6 Hwy 1 and Sunset St.
6 Heinz Rd. and Hwy 6 McCollister Blvd. and S Gilbert St.
7 Dickenson Ln. and Russell Dr. Hwy 1 and Orchard St.
8 Industrial Park Rd. and Hwy 6 Hwy 1 and Ruppert Rd.
9 Gilbert Ct. and Kirkwood Ave. Myrtle Ave and S Riverside Dr.
10 Broadway St. and Hwy 6 Cae Dr. and Rohret Rd.
Table 3: List of Top 10 Intersection Collision Locations for Quadrants 1 and 2
Table 4: List of Top 10 Intersection Collision Locations for Quadrants 3 and 4
6
2013-2015 / 2015-2017 Collision Comparison
In comparing the top ten intersections between 2013 and 2015 to those between 2015 and 2017, the data
shows collision numbers, severity of collisions and collision rates continue to remain constant as shown in
Figures 3 and 4. Two intersections moved into the top ten ranking (Riverside Dr./ Highway 1 and 6 and
Highway 1/ Mormon Trek Boulevard) and two intersections moved out of the ranking (Riverside Drive/ Hawkins
Drive and Highway 6/ Fair Meadows Boulevard).
Figure 3 compares the total number of collisions for the top ten intersection locations between 2015 and 2017
to those between 2013 and 2015. Between 2013 and 2017, the intersection with the highest number of total
collisions was S Gilbert Street/ Highway 6.
Figure 3:
Figure 4:
7
Figure 4 compares the three highest collision types for each intersection between 2013 and 2015 to those
between 2015 and 2017. Across the ten intersections, rear-end collisions account for a majority of collisions
followed by angle, oncoming left-turn collisions.
2018-2022 Capital Improvement Program Projects
Of the top ten intersection collision
locations, two intersections have
projects scheduled in Iowa City’s
2018-2022 Capital Improvement
Program. The Mormon Trek
Boulevard four to three lane
conversion will be completed in
2019 and will help to reduce the
number of rear-end and angle,
oncoming left-turn collisions by
upwards of 25% because of the
dedicated center left-turn lane. The
conversion will also improve
walkability with fewer lanes for
pedestrians to cross, and traffic will
be located farther from the sidewalk.
The Madison Street and Burlington Street intersection will be reconstructed to add turn lanes on Madison
Street and signal improvements, amongst others, in order to address pedestrian and vehicle traffic flows.
These improvements will also help to reduce the number of rear-end collisions as vehicles will be able to
queue in a dedicated turn-lane as compared to queuing in a through/ left-turn lane. Additionally, with only one
dedicated through lane the number of broadside collisions may also decrease as opposing vehicles will only
need to respond to one-lane of oncoming vehicles. This project will begin in 2019.
Potential Countermeasures
To date, staff reviewed the top ten intersection collision locations and have identified and/or implemented
potential countermeasures at multiple intersections.
• Hwy 6 & Sycamore Street: Staff is currently researching the flashing yellow arrow sequence at the
intersection.
• Hwy 6 & Gilbert Street: Staff installed a ‘Yield to Pedestrian’ sign on the northwest corner of the
intersection for west to northbound right-turning vehicles. This will remind motorists to yield to
pedestrians as they turn right.
• Hwy 6 & Boyrum Street: Staff is reviewing the left-turn traffic signal poles, shields, etc. to determine if
any adjustments need to be made.
• Hwy 1/ Hwy 6 corridor: Staff reviewed the signal timings for yellow clearance and will adjust if
necessary.
Staff intends to continue to monitor the top ten intersection collision locations to identify potential
countermeasures to decrease the number and severity of collisions. An overview of best practice
countermeasures is available on Page 14.
Table 5: CIP Projects
8
Assumptions
The following are the assumptions made for collisions at mid-blocks:
• Collisions occurring within 250 feet (+/- 50) feet from the intersection of nodes (nodes only include
public streets) will be included.
• Types of roadways include: all non-intersection, intersection with bike/pedestrian, other intersection, not
reported, T-Intersection, and unknown. Cloverleaf freeway ramps and railroad crossings are not
considered intersections. Roundabouts/traffic circles are intersections. Alleyways are not considered
intersections, and collisions occurring in the alleyways will not be counted. Crashes on exit/entrance
ramps for interstate freeways will not be counted.
• Major Causes do not include: ran traffic signal, FTY at uncontrolled intersection, FTY making right turn
on red signal, FTY from yield sign.
• Collisions unlikely caused by the intersection (as ascertained from the crash report) will be counted.
• If the roadway type is a commercial/private road (with other roads intersecting it), the crash will not be
counted. If the roadway is a private commercial/residential driveway, the crash will be counted, except
if there is a traffic controlling device on it at the main road (i.e. traff ic light). Accidents in
alleyways/parking lots/institutional roads will not be counted. Accidents with vehicles entering or exiting
alleyways/parking lots/institutional roads will be counted.
• Collisions involving one vehicle will be counted.
• Sideswipes while vehicles were traveling the same direction will be included (i.e. changing lanes,
hitting a parked car), while sideswipes involving FTY at an intersection will not be included.
• If the data record regarding the manner of the crash is incomplete, but involves at least one vehicle, it
will be counted.
• If the roadway type is a non-intersection but the manner of the crash is likely caused by the intersection
(i.e. rear-end) the crash will not be counted.
Top 5 Mid-Block Collision Locations
Figure 5 depicts the top five mid-block collision locations in Iowa City (2015-2017). Two of the five locations
are located along the Highway 1 and 6 corridor. The other three locations are located along Riverside Drive,
Dubuque Street and North Dodge Street. Table 6 lists the midblock rankings and their associated ID number.
Mid-Block Evaluation
9
Table 6: Top 5 Mid-Block Collision Locations
Five Highest Ranking Mid-Block Locations
ID Mid-Block Location Mid-Block Rank
1 Hwy 1 between Sunset St. and Mormon Trek Blvd. 1
2 N Dubuque St. between Taft Speedway and Kimball Rd. 2
3 N Dodge St. between I-80 EB Ramp and Scott Blvd. 3
4 Hwy 6 between Valley Ave. and N Riverside Dr. 4
5 Hwy 6 between S Gilbert St. and Boyrum St. 5
Figure 5: Top 5 Mid-Block Collision Locations
10
Top 5 Mid-Block Collision Locations by Quadrant
Figure 6 displays the top five mid-block collision locations by quadrant. The four quadrants are defined by
major arterial streets, which allows for a comprehensive view of the highest ranking mid-block locations across
Iowa City. Specific intersection information can be found in Tables 7 and 8. The highest ranking mid-block
locations are primarily situated along major arterial and collector streets.
The highest-ranking locations in Quadrant 1 are primarily located along Dubuque Street. In Quadrant 2 the
highest collision locations are situated along North Dodge Street. In Quadrant 3 the mid-block collision
locations are varied with several located along the Highway 6 corridor. Lastly, in Quadrant 4 the highest-
ranking mid-block locations are situated primarily along Highway 1.
Figure 6: Top 5 Mid-Block Collision Locations by Quadrant
Q1
Q2
Q3
Q4
11
2013-2015 / 2015-2017 Mid-Block Collision Comparison
In comparing the top five mid-block collision locations between 2013 and 2015 to those between 2015 and
2017, the data shows collision numbers, severity and collision rates continue to remain constant as shown in
Figures 7 and 8.
Hwy 1 between Sunset Street and Mormon Trek Boulevard experienced a significant increase in the number of
collisions between 2015 and 2017 moving it from the third highest ranking location to the first. The midblock
location on Hwy 6 between S Gilbert Street and Boyrum Street dropped from fourth to fifth in the intersection
ranking and the combined score increased slightly from 8.25 to 8.5. Though the combined score increased
slightly, the number of collisions, crash rate, and severity of collisions remained roughly the same. The
midblock locations ranked second through fourth between 2015 and 2017 were not in the top five ranking
between 2013 and 2015. These locations experienced an increase in collisions, severity, and crash rate.
Ten Highest Ranking Intersections by Quadrant
Intersection
Rank
Quadrant
1 2
West of Dubuque St. & North of Melrose Ave East of Dubuque St. & North of Burlington St./Court St.
1 N Dubuque St. between Taft Speedway and
Kimball Rd. N Dodge St. between I-80 EB Ramp and Scott Blvd.
2 Hwy 6 between Valley Ave. and N Riverside Dr. Dodge St. between Governor St. and Brown St
3 N Dubuque St. between I-80 WB Ramp and I-80
EB Ramp N Dodge St. between I-80 WB Ramp and I-80 EB Ramp
4 N Dubuque St. between I-80 EB Ramp and
Meadow Ridge Ln. N Dodge St. between Northgate Dr. and 1-80 WB Ramp
5 Newton Rd. between Woolf Ave. and S
Riverside Dr. Scott Blvd. between N 1st Ave. and Rochester Ave.
Ten Highest Ranking Intersections by Quadrant
Intersection
Rank
Quadrant
3 4
East of Gilbert St. & South of
Burlington St./Court St. West of Gilbert St. & South of Melrose Ave
1 Hwy 6 between S Gilbert St. and Boyrum St. Hwy 1 between Sunset St. and Mormon Trek Blvd.
2 Mall Dr. between Lower Muscatine Rd. and S 1st
Ave.
Hwy 1 between Hudson Ave. / Shirken Dr. and Orchard
St.
3 Hwy 6 between Lakeside Dr. and Heinz Rd. Hwy 6 between S Riverside Dr. and Sturgis Corner Dr.
4 Governor St. between Burlington St. and
Bowery St. Hudson Ave. between Benton St. and Hwy 1
5 Van Buren St. between Burlington St. and
Bowery St. W Benton St. between Greenwood Dr. and Miller Ave.
Table 7: List of Top 5 Mid-Block Collision Locations for Quadrants 1 and 2
Table 8: List of Top 5 Mid-Block Collision Locations for Quadrants 3 and 4
12
Figure 8 compares the four highest collision manners (rear-end, angle, oncoming left-turn, sideswipe, and
broadside) for each mid-block location between 2013 and 2015 to those between 2015 and 2017. Across the
five mid-block locations, rear-end collisions account for a majority of collisions followed by sideswipe collisions.
All five mid-block locations experienced an increase in the total number of collisions.
Figure 7:
Figure 8:
13
2018-2022 Capital Improvement Program Projects
Of the top five mid-block collision
locations, two locations have projects
scheduled in Iowa City’s 2018-2022
Capital Improvement Program. The N
Dubuque Street project (Gateway
Project) involved the reconstruction
and elevation of Dubuque Street while
also addressing pedestrian and traffic
flows. The project is currently in the
final stages of completion and may
decrease the number of rear-end and
angle-oncoming left-turn collisions,
with the decrease in the posted speed
limit from 30-mph to 25-mph.
A resurfacing project on Highway 6 between Rocky Shore Drive and Hwy 1 and Hwy 6 will be completed in
2019. While the resurfacing may not have direct impacts on the number of collisions, new pavement markings
may reinforce driver expectations and reduce collisions.
Potential Countermeasures
Staff intends to review the top five mid-block collision locations to identify potential countermeasures to
decrease the number and severity of collisions. An overview of best practice countermeasures is available on
Page 14.
Table 9: CIP Projects
14
Potential Countermeasures
After identifying the highest ranked collision locations in Iowa City, the next step is to identify potential
countermeasures. Countermeasures can be defined as a device, program, policy, or capital investment
intended to improve safety and reduce the number of collisions. To follow are best practices available to assist
in identifying countermeasures depending on the collision pattern and probable cause. Staff will use these best
practices to help identify any countermeasure that could be implemented to reduce the number, rate and
severity of collisions.
Collision Probable General
Pattern Cause Countermeasure
Right angle collisions at
unsignalized
intersections
Restricted sight distance Remove sight obstructions
Restrict parking near corners
Install/improve street lighting
Reduce speed approaches*
Install signals [see MUTCD]
Install stop signs [see MUTCD]
Install warning signs [see MUTCD]
Install yield signs [see MUTCD]
Channelize intersections
Large total intersection volume Install signals [see MUTCD]
Reroute through traffic
High approach speed Reduce speed limit on approaches*
Install rumble strips
Roadway design inadequate Widen lanes
Change from angle to parallel parking
Prohibit parking
Reroute through traffic
Rear end collisions at
unsignalized
intersections
Pedestrian crossing Install/improve signing or marking of
pedestrian crosswalk
Relocate crosswalk
Driver not aware of intersection Install/improve warning signs
Slippery surface Overlay pavement
Provide adequate drainage
Groove pavement
Reduce speed limit on approaches*
Provide "SLIPPERY WHEN WET" signs
Large number of turning vehicles Create Left- or right-turn lanes
Prohibit turns
Increase curb radii
*Spot speed study should be conducted to justify speed limit reduction
15
Collision Probable General
Pattern Cause Countermeasure
Rear end collisions at
signalized intersections
Poor visibility of signals Install / improve advance warning devices
Install overhead signals
Install 12" signal lenses [see MUTCD]
Install visors
Install backplates
Relocate signals
Add additional signal heads
Remove obstacles
Reduce speed limits on approaches*
Inadequate signal timing Adjust amber phase
Provide progression through a set of
signalized intersections
Fixed object collisions
and/or vehicles running
off roadway
Slippery surface Overlay pavement
Provide adequate drainage
Groove pavement
Reduce speed limit on approaches*
Provide "SLIPPERY WHEN WET" signs
Roadway design inadequate for Widen lanes
traffic conditions Relocate islands
Close curb lane
Poor delineation Improve / install pavement markings
Install roadside delineators
Install advance warning devices
Sideswipe collisions
between vehicles
traveling opposite
directions or head-on
collisions
Roadway design inadequate for Improve / install pavement markings
traffic conditions Channelize intersections
Create one-way streets
Remove constrictions such as parked
vehicles
Install median divider
Widen lanes
Collisions between
vehicles traveling in
same direction such as
sideswipe, turning, or
lane changing
Roadway design inadequate for Widen lanes
traffic conditions Channelize intersections
Provide turning bays
Install/improve parking lane lines
Remove parking
Collisions with parked
cars or cars being
parked
Large parking turnover Prohibit parking
Change from angle to parallel parking
Reroute through traffic
Create one-way streets
Create off-street parking
Reduce speed limit*
*Spot speed study should be conducted to justify speed limit reduction
16
Collision Probable General
Pattern Cause Countermeasure
Right angle collisions at
signalized intersections
Poor visibility of signals Install/improve advance warning devices
Install overhead signals
Install 12" signal lenses [see MUTCD]
Install visors
Install backplates
Improve location of signal heads
Add additional signal heads
Reduce speed limits on approaches*
Inadequate signal timing Adjust amber phase
Provide all-red clearance phase
Add multi-dial controller
Install signal actuation
Re-time signals
Provide progression through a set of
signalized intersections
Left-turn collisions at
intersections
Large volume of left turns Provide left turn signal phase
Prohibit left turns
Reroute left turn traffic
Channelize intersections
Install stop signs [see MUTCD]
Create one-way streets
Restricted sight distance Remove obstacles
Install warning signs
Reduce speed limit on approaches*
Fixed-object collisions Object near traveled way Remove obstacles near roadway
Install barrier curbing
Install breakaway feature to light poles,
sign posts, etc.
Project objects with guardrails
Pedestrian crossings Install/improve signing or markings of
pedestrian crosswalks
Provide pedestrian "WALK" phase
Slipper surface Overlay pavement
Provide adequate drainage
Groove pavement
Reduce speed limit on approaches*
Provide "SLIPPERY WHEN WET" signs
Unwarranted signals Remove signals [see MUTCD]
Large turning volumes Create left- or right-turn lanes
Prohibit turns
Increase curb radii
Night collisions Poor visibility Install/improve street lighting
Install/improve delineation markings
Install/improve warning signs
Wet pavement collisions Slippery pavement Overlay with skid-resistant surface
Provide adequate drainage
Groove existing pavement
Reduce speed limit*
Provide "SLIPPERY WHEN WET" signs
*Spot speed study should be conducted to justify speed limit reduction
17
The following data has been included to compare collision trends between 2013 and 2015 to those occurring
between 2015 and 2017. The number of collisions per 1,000 people in Iowa City was compared to that of
similar sized cities in Iowa.
Between 2013 and 2017,
the City of North Liberty
had the fewest number of
collisions per 1,000 people
followed by the City of
Cedar Rapids. Iowa City
had the fifth lowest
number of collisions per
1,000 people as compared
to eleven other
communities, whereas
Davenport had the highest
number of collisions.
As shown in Table 10, the
City of Iowa City averaged
57.3 collisions per 1,000
people from 2015-2017
and 57.1 collisions per
1,000 people from 2013-
2015. While Iowa City’s population and total number of collisions increased between these time frames, the per
capita collision rate only increased marginally (0.2). As compared to the other communities, Iowa City has one
of the lowest numbers of collisions per capita. Of the communities analyzed, the cities of Des Moines and
Davenport had the highest rates of collisions per 1,000 persons.
Table 10: Per Capita Collision Comparisons 2013-2017
City
Collisions occurring between 2015-2017 Collisions occurring between 2013-2015
Population
(2016)
2015-2017
Collisions
Collisions per
1,000 persons
Population
(2010)
2013-2015
Collisions
Collisions per
1,000 persons
North Liberty 16,984 330 19.4 13,374 271 20.3
Cedar Rapids 129,537 6,236 48.1 126,326 5,799 45.9
Ames 64,073 3,239 50.6 58,965 3,124 53.0
Ankeny 53,413 3,000 56.2 45,582 2,574 56.5
Iowa City 72,385 4,149 57.3 67,862 3,875 57.1
West Des
Moines 61,624 3,655 59.3 56,609 3,428 60.6
Waterloo 68,357 4,091 59.8 68,406 4,369 63.9
Sioux City 82,666 6,100 73.8 82,684 5,687 68.8
Council Bluffs 62,326 4,615 74.0 62,230 4,509 72.5
Coralville 20,078 1,624 80.9 18,907 1,516 80.2
Des Moines 212,859 17,296 81.2 203,433 15,367 75.5
Davenport 102,305 9,244 90.3 99,685 8,556 85.8
Source: 2016 ACS 5-Year Population Estimate and Iowa DOT Crash Analysis Tool
Per Capita Collision Comparisons
18
ID Road 1 Road 2 Collisions Collision
Points Crash Rate Crash Rate
Points Severity Severity
Points
Combined
Score Rank
1 Sycamore St. Hwy 6 41 15 1.44 6 53 14 12.25 1
2 S Gilbert St. Hwy 6 46 15 1.03 5 54 14 12.00 2
3 Boyrum St. Hwy 6 33 15 0.79 4 41 11 10.25 3
4 Melrose Ave. Mormon Trek
Blvd. 29 15 0.93 4 39 10 9.75 4
5 Riverside Dr. W Burlington St. /
Grand Ave. 36 15 0.72 3 38 10 9.50 5
6 E Burlington St. S Gilbert St. 32 15 0.99 4 34 9 9.25 6
7 S Riverside Dr. W Benton St. 32 15 0.82 4 36 9 9.25 6
8 Hwy 1 Hwy 6 28 14 0.61 3 34 9 8.75 8
9 Hwy 1 Mormon Trek
Blvd. 32 15 0.90 4 32 8 8.75 8
10 Madison St. W Burlington St. 32 15 0.94 4 32 8 8.75 8
11 S 1st Ave. Hwy 6 25 13 0.87 4 31 8 8.25 11
12 Hwy 1 Sunset St. 25 13 0.78 4 27 7 7.75 12
13 Hawkins Dr. Hwy 6 23 12 0.45 2 27 7 7.00 13
14 Keokuk St. Hwy 6 21 11 0.59 3 25 7 7.00 13
15 Church St. N Dubuque St. 20 10 1.02 5 22 6 6.75 15
16 Iowa Ave. Van Buren St. 11 6 2.27 10 17 5 6.50 16
17 McCollister Blvd. S Gilbert St. 17 9 1.39 6 19 5 6.25 17
18 Dodge St. E Burlington St. 20 10 0.92 4 20 5 6.00 18
19 Fair Meadows Blvd. Hwy 6 17 9 0.85 4 19 5 5.75 19
20 E Burlington St. S Clinton St. 20 10 0.52 3 20 5 5.75 19
21 Heinz Rd. Hwy 6 14 7 1.05 5 18 5 5.50 21
22 Hwy 1 Orchard St. 18 9 0.71 3 20 5 5.50 21
23 Hwy 1 Ruppert Rd. 15 8 0.51 3 19 5 5.25 23
24 Myrtle Ave. S Riverside Dr. 16 8 0.55 3 18 5 5.25 23
25 Industrial Park Rd. Hwy 6 14 7 0.72 3 20 5 5.00 25
26 Dickenson Ln. Russell Dr. 5 3 22.60 15 5 1 5.00 25
27 Broadway St. Hwy 6 15 8 0.60 3 15 4 4.75 27
28 Dodge St. Iowa Ave. 12 6 1.08 5 14 4 4.75 27
29 Gilbert Ct. Kirkwood Ave. 11 6 1.06 5 13 4 4.75 27
30 Governor St. Iowa Ave. 12 6 1.38 6 12 3 4.50 30
31 Camp Cardinal Blvd. Melrose Ave. 14 7 0.59 3 14 4 4.50 30
32 Cae Dr. Rohret Rd. 12 6 0.80 4 14 4 4.50 30
33 E Burlington St. S Dubuque St. 14 7 0.57 3 16 4 4.50 30
34 Iowa Ave. S Riverside Dr. 16 8 0.45 2 16 4 4.50 30
35 S Gilbert St. Stevens Dr. 9 5 1.21 5 13 4 4.50 30
36 E Jefferson St. N Gilbert St. 12 6 0.69 3 14 4 4.25 36
37 N Dubuque St. Park Rd. 14 7 0.47 2 16 4 4.25 36
38 E Court St. S 1st Ave. 12 6 0.51 3 14 4 4.25 36
39 Kirkwood Ave. S Gilbert St. 13 7 0.48 2 13 4 4.25 36
40 Valley Ave. Hwy 6 11 6 0.50 2 13 4 4.00 40
41 E Market St. N Linn St. 10 5 1.01 5 10 3 4.00 40
Appendix: Complete Intersection Ranking
19
ID Road 1 Road 2 Collisions Collision
Points Crash Rate Crash Rate
Points Severity Severity
Points
Combined
Score Rank
42 N Scott Blvd. Rochester Ave. 12 6 0.83 4 12 3 4.00 40
43 Muscatine Ave. S 1st Ave. 11 6 0.36 2 13 4 4.00 40
44 Muscatine Ave. S 7th Ave. 10 5 1.06 5 10 3 4.00 40
45 E Burlington St. S Capitol St. 12 6 0.40 2 14 4 4.00 40
46 Bowery St. Dodge St. 9 5 0.84 4 9 3 3.75 46
47 E Market St. Johnson St. 8 4 1.16 5 12 3 3.75 46
48 Muscatine Ave. S Scott Blvd. 9 5 0.77 4 9 3 3.75 46
49 S Gilbert St. Southgate Ave. 9 5 0.77 4 9 3 3.75 46
50 E Burlington St. Governor St. 10 5 0.53 3 12 3 3.50 50
51 Taylor Dr. Hwy 6 8 4 0.34 2 14 4 3.50 50
52 Cameron Way Mormon Trek
Blvd. 10 5 0.62 3 10 3 3.50 50
53 E Market St. N Dubuque St. 11 6 0.49 2 11 3 3.50 50
54 N Dodge St. N Scott Blvd. 12 6 0.37 2 12 3 3.50 50
55 Lower Muscatine Rd. S 1st Ave. 10 5 0.60 3 10 3 3.50 50
56 Greenwood Dr. W Benton St. 10 5 0.72 3 12 3 3.50 50
57 Mormon Trek Blvd. W Benton St. 9 5 0.51 3 11 3 3.50 50
58 Mormon Trek Blvd. Westwinds Dr. 10 5 0.61 3 10 3 3.50 50
59 E College St. Lucas St. 5 3 1.77 8 5 1 3.25 59
60 E Market St. N Gilbert St. 7 4 0.61 3 11 3 3.25 59
61 Lower West Branch
Rd. N Scott Blvd. 7 4 0.67 3 11 3 3.25 59
62 N Dodge St. Northgate Dr. 7 4 0.61 3 11 3 3.25 59
63 E Prentiss St. S Dubuque St. 6 3 1.34 6 6 2 3.25 59
64 E College St. S Gilbert St. 8 4 0.53 3 10 3 3.25 59
65 E Court St. S Scott Blvd. 8 4 0.58 3 10 3 3.25 59
66 N Riverside Dr. Hwy 6 9 5 0.19 1 11 3 3.00 66
67 E Burlington St. Lucas St. 7 4 0.48 2 9 3 3.00 66
68 Hawkeye Park Rd. Melrose Ave. 7 4 0.47 2 9 3 3.00 66
69 Bartlett Rd. Mormon Trek
Blvd. 7 4 0.44 2 9 3 3.00 66
70 Bradford St. S 1st. Ave. 7 4 0.47 2 9 3 3.00 66
71 E Court St. S Gilbert St. 7 4 0.35 2 9 3 3.00 66
72 Iowa Ave. S Gilbert St. 8 4 0.49 2 10 3 3.00 66
73 Dodge St. E Washington St. 7 4 0.68 3 7 2 2.75 73
74 E Jefferson St. Governor St. 8 4 0.74 3 8 2 2.75 73
75 Melrose Ct. Melrose Ave. 7 4 0.55 3 7 2 2.75 73
76 Old Highway 218 Ruppert Rd. 5 3 0.30 2 9 3 2.75 73
77 Kirkwood Ave. Summit St. 8 4 0.52 3 8 2 2.75 73
78 Church St. Dodge St. 6 3 0.53 3 6 2 2.5 78
79 Hudson Ave. Hwy 1 7 4 0.28 2 7 2 2.50 78
80 Newton Rd. Hwy 6 7 4 0.32 2 7 2 2.50 78
81 Bowery St. Johnson St. 6 3 0.69 3 6 2 2.50 78
82 Iowa Ave. Lucas St. 4 2 1.29 6 4 1 2.50 78
83 Lower Muscatine Rd. Mall Dr. 6 3 0.58 3 6 2 2.50 78
84 E Court St. Muscatine Ave. 7 4 0.47 2 7 2 2.50 78
20
ID Road 1 Road 2 Collisions Collision
Points Crash Rate Crash Rate
Points Severity Severity
Points
Combined
Score Rank
85 Kimball Ave. Prairie du Chien
Rd. 4 2 0.96 4 6 2 2.50 78
86 Bowery St. S Gilbert St. 7 4 0.30 2 7 2 2.50 78
87 E Benton St. S Gilbert St. 7 4 0.43 2 7 2 2.50 78
88 E Washington St. S Gilbert St. 7 4 0.40 2 7 2 2.50 78
89 N Dubuque St. SW Ramp Curve 7 4 0.27 2 7 2 2.50 78
90 Capitol St. W Benton St. 7 4 0.36 2 7 2 2.50 78
91 Dodge St. E Jefferson St. 6 3 0.48 2 8 2 2.25 91
92 E Burlington St. Johnson St. 6 3 0.32 2 8 2 2.25 91
93 Dublin Dr. Melrose Ave. 5 3 0.34 2 7 2 2.25 91
94 E Market St. N Clinton St. 6 3 0.38 2 6 2 2.25 91
95 B'Jaysville Ln. /
Foster Rd. N Dubuque St. 7 4 0.23 1 7 2 2.25 91
96 E Davenport St. N Gilbert St. 4 2 1.10 5 4 1 2.25 91
97 N 1st. Ave. Rochester Ave. 6 3 0.44 2 8 2 2.25 91
98 Friendship St. S 1st. Ave. 6 3 0.33 2 6 2 2.25 91
99 E Washington St. S Clinton St. 6 3 0.42 2 6 2 2.25 91
100 Liberty Dr. S Scott Blvd. 4 2 0.71 3 6 2 2.25 91
101 E Burlington St. Van Buren St. 6 3 0.34 2 6 2 2.25 91
102 Sturgis Corner Dr. Hwy 6 6 3 0.18 1 6 2 2.00 102
103 Dodge St. Market St. 4 2 0.30 2 6 2 2.00 102
104 E Court St. S 7th Ave. 5 3 0.54 3 5 1 2.00 102
105 E Burlington St. S Linn St. 5 3 0.22 1 7 2 2.00 102
106 E Burlington St. Summit St. 4 2 0.29 2 6 2 2.00 102
107 Lower Muscatine Rd. Sycamore St. 5 3 0.52 3 5 1 2.00 102
108 E Washington St. Johnson St. 4 2 0.69 3 4 1 1.75 108
109 Iowa Ave. Johnson St. 4 2 0.67 3 4 1 1.75 108
110 Abbey Ln. Mormon Trek
Blvd. 5 3 0.41 2 5 1 1.75 108
111 Dodge St. Prairie Du Chien
Rd. 5 3 0.33 2 5 1 1.75 108
112 N Dubuque St. Ronald St. 5 3 0.31 2 5 1 1.75 108
113 Mall Dr. S 1st Ave. 5 3 0.30 2 5 1 1.75 108
114 Keokuk St. Southgate Ave. 5 3 0.46 2 5 1 1.75 108
115 E Jefferson St. Van Buren St. 4 2 0.65 3 4 1 1.75 108
116 Miller Ave. W Benton St. 5 3 0.41 2 5 1 1.75 108
117 1st Ave Wayne St. 5 3 0.32 2 5 1 1.75 108
118 E Bloomington St. Governor St. 4 2 0.48 2 4 1 1.50 118
119 Miller Ave. Hwy 1 5 3 0.19 1 5 1 1.50 118
120 S Scott Blvd. Hwy 6 4 2 0.29 2 4 1 1.50 118
121 Brown St. N Dubuque St. 5 3 0.14 1 5 1 1.50 118
122 Church St. N Gilbert St. 3 1 0.52 3 3 1 1.50 118
123 E Jefferson St. N Linn St. 4 2 0.47 2 4 1 1.50 118
124 Hospital Loop Dr. Stadium Dr. 4 2 0.48 2 4 1 1.50 118
125 S Riverside Dr. Sturgis Corner Dr. 5 3 0.19 1 5 1 1.50 118
126 Sunset St. W Benton St. 4 2 0.30 2 4 1 1.50 118
127 Mormon Trek Blvd. Westside Dr. 4 2 0.30 2 4 1 1.50 118
21
ID Road 1 Road 2 Collisions Collision
Points Crash Rate Crash Rate
Points Severity Severity
Points
Combined
Score Rank
128 Melrose Ave. Westwinds Dr. 4 2 0.25 2 4 1 1.50 118
129 S Scott Blvd. Wintergreen Dr. 4 2 0.46 2 4 1 1.50 118
130 Dodge St. E Bloomington St. 3 1 0.30 2 3 1 1.25 130
131 Dodge St. E College St. 3 1 0.28 2 3 1 1.25 130
132 2nd Ave. E Court St. 3 1 0.36 2 3 1 1.25 130
133 4th Ave. E Court St. 3 1 0.36 2 3 1 1.25 130
134 E College St. Governor St. 3 1 0.34 2 3 1 1.25 130
135 Boyrum St. Hollywood Blvd. 4 2 0.09 1 4 1 1.25 130
136 Maiden Ln. Kirkwood Ave. 3 1 0.29 2 3 1 1.25 130
137 Governor St. Market St. 3 1 0.25 2 5 1 1.25 130
138 Emerald St. Melrose Ave. 4 2 0.21 1 4 1 1.25 130
139 E Burlington St. Muscatine Ave. 4 2 0.24 1 4 1 1.25 130
140 I-80 WB Ramp N Dodge St. 4 2 0.18 1 4 1 1.25 140
141 Fairchild St. N Dubuque St. 4 2 0.25 1 4 1 1.25 140
142 N Riverside Dr. River St. 3 1 0.35 2 3 1 1.25 140
143 E Benton St. S Clinton St. 4 2 0.21 1 4 1 1.25 140
144 E Prentiss St. S Clinton St. 3 1 0.47 2 3 1 1.25 140
145 Highland Ave. S Gilbert St. 4 2 0.09 1 4 1 1.25 140
146 E Washington St. S Linn St. 3 1 0.31 2 3 1 1.25 140
147 E Court St. Summit St. 3 1 0.31 2 3 1 1.25 140
148 Burns Ave. Sycamore St. 3 1 0.48 2 3 1 1.25 140
149 Bowery St. Van Buren St. 3 1 0.34 2 3 1 1.25 140
150 S Capitol St. W Prentiss St. 3 1 0.45 2 3 1 1.25 140
151 N Scott Blvd. Washington St. 3 1 0.27 2 3 1 1.25 140
152 S 1st Ave. Washington St. 3 1 0.29 2 3 1 1.25 140
153 W Benton St. Westgate St. 3 1 0.35 2 5 1 1.25 140
154 Hwy 1 Westport Plaza 4 2 0.16 1 4 1 1.25 140
155 Grand Ave. Ct. Grand Ave. 3 1 0.11 1 3 1 1.00 155
156 Keokuk St. Kirkwood Ave. 3 1 0.21 1 3 1 1.00 155
157 Lucas St. Kirkwood Ave. 3 1 0.21 1 3 1 1.00 155
158 Galway Dr. Melrose Ave. 3 1 0.18 1 3 1 1.00 155
159 Kennedy Pkwy Melrose Ave. 3 1 0.18 1 3 1 1.00 155
160 E Jefferson St. N Clinton St. 3 1 0.23 1 3 1 1.00 155
161 E Bloomington St. N Dubuque St. 3 1 0.17 1 3 1 1.00 155
162 E Davenport St. N Dubuque St. 3 1 0.18 1 3 1 1.00 155
163 E Jefferson St. N Dubuque St. 3 1 0.25 1 5 1 1.00 155
164 Hickory Heights Ln. N Scott Blvd. 3 1 0.21 1 3 1 1.00 155
165 N 1st Ave. N Scott Blvd. 3 1 0.17 1 3 1 1.00 155
166 Hwy 1 Naples Ave. 3 1 0.24 1 5 1 1.00 155
167 McCollister Blvd. Old Highway 218 3 1 0.21 1 3 1 1.00 155
168 Grand Ave. S Grand Ave. 3 1 0.15 1 3 1 1.00 155
169 N Dubuque St. Taft Speedway 3 1 0.12 1 3 1 1.00 155
170 Orchard St. W Benton St. 3 1 0.25 1 3 1 1.00 155
171 Melrose Ave. Westgate St. 3 1 0.16 1 3 1 1.00 155
22
ID Street Node 1 Node 2 Collisions Collision
Points Crash Rate
Crash
Rate
Points
Severity Severity
Points
Combined
Score
Mid-
block
Rank
1 Hwy 1 Sunset St. Mormon
Trek Blvd. 32 15 3.39 14 34 9 11.75 1
2 N Dubuque
St.
Taft
Speedway Kimball Rd. 31 14 3.25 15 35 9 11.50 2
3 N Dodge St. I-80 EB
Ramp Scott Blvd. 25 13 3.44 14 29 8 10.75 3
4 Hwy 6 Valley Ave. N Riverside
Dr 25 13 2.11 9 31 8 9.50 4
5 Hwy 6 S Gilbert
St. Boyrum St. 18 9 3.59 15 20 5 8.50 5
6 N Dubuque
St.
I-80 WB
Ramp
I-80 EB
Ramp 13 7 5.14 15 24 6 8.25 6
7 Hwy 1
Hudson
Ave. /
Shirken Dr.
Orchard St. 9 5 4.36 15 20 5 7.50 7
8 N Dubuque
St.
I-80 EB
Ramp
Meadow
Ridge Ln. 17 9 2.49 10 17 5 7.25 8
9 Newton Rd. Woolf Ave. S Riverside
Dr. 11 6 3.27 14 13 4 7.00 9
10 Hwy 6 W Newton Rd. Valley Ave. 11 6 5.04 15 11 3 6.75 10
11 S Clinton St. Washington
St.
Burlington
St. 10 5 12.85 15 10 3 6.50 11
12 S Capitol St. Washington
St.
Burlington
St. 10 5 85.52 15 10 3 6.50 11
13 Melrose Ave. Westwinds
Dr.
Mormon
Trek Blvd. 7 4 4.13 15 7 2 5.75 13
14 Hwy 6 S Riverside
Dr.
Sturgis
Corner Dr. 8 4 8.23 15 8 2 5.75 13
15 Mall Dr.
Lower
Muscatine
Rd.
S 1st Ave. 5 3 7.61 15 5 2 5.50 15
16 Iowa Ave. S Riverside
Dr.
Madison
St. 5 3 4.06 15 5 2 5.50 15
17 Governor St. Burlington
St. Bowery St. 6 3 12.08 15 6 2 5.50 15
18 Van Buren St. Burlington
St. Bowery St. 6 3 24.16 15 6 2 5.50 15
19 Dodge St. Governor
St. Brown St. 6 3 3.57 15 8 2 5.50 15
20 Johnson St. Court St. Bowery St. 6 3 30.23 15 8 2 5.50 15
21 Hudson Ave. Benton St. Hwy 1 5 3 182.97 15 5 2 5.50 15
22 S 1st Ave.
J St. /
Bradford
Dr.
Mall Dr. 5 3 4.43 15 7 2 5.50 15
23 W Benton St. Greenwood
Dr. Miller Ave. 5 3 4.11 15 5 2 5.50 15
24 Hwy 6 Lakeside
Dr. Heinz Rd. 10 5 2.03 9 16 4 5.50 15
25 Burlington St. S Riverside
Dr.
Madison
St. 10 5 2.50 10 12 3 5.25 25
26 Madison St. Washington
St.
Burlington
St. 4 2 8.92 15 8 2 5.25 25
27 Westwinds
Dr. Roberts Rd. Mormon
Trek Blvd. 4 2 14.30 15 6 2 5.25 25
28 Melrose Ave. Dublin Dr. Hawkeye
Park Rd. 4 2 5.25 15 8 2 5.25 25
29 Hwy 1 Westport
Plaza
Ruppert
Rd. 11 6 1.98 8 11 3 5.00 29
30 S 1st Ave. Mall Dr.
Lower
Muscatine
Rd.
7 4 2.47 10 9 3 5.00 29
31 W Benton St. Oaknoll Dr. Greenwood
Dr. 4 2 15.11 15 4 1 4.75 31
32 Hwy 6 Hawkins
Dr. Newton Rd. 4 2 9.50 15 4 1 4.75 31
33 S Riverside
Dr. Benton St. Sturgis
Corner Dr. 4 2 10.10 15 4 1 4.75 31
Appendix: Complete Mid-Block Ranking
23
ID Street Node 1 Node 2 Collisions Collision
Points Crash Rate
Crash
Rate
Points
Severity Severity
Points
Combined
Score
Mid-
block
Rank
34 Hawkins Dr.
Finkbine
Commuter
Dr.
Elliot Dr. 5 3 2.99 12 7 2 4.75 31
35 Emerald St. Melrose
Ave. Benton St. 3 1 6.87 15 3 1 4.50 35
36 Primrose Ct.
Whispering
Meadow
Dr.
Cul de Sac 3 1 159.59 15 3 1 4.50 35
37 Williams St. Muscatine
Ave.
Wayne
Ave. 3 1 83.56 15 3 1 4.50 35
38 Duck Creek
Dr.
Deerfield
Dr. Rohret Rd. 3 1 15.57 15 3 1 4.50 35
39 Taylor Dr. Tracy Ln. Sandusky
Dr. 3 1 14.60 15 3 1 4.50 35
40 Gilbert St. Benton St. Kirkwood
Ave. 3 1 4.79 15 3 1 4.50 45
41 S Scott Blvd. American
Legion Rd.
Hampton
St. 3 1 5.56 15 3 1 4.50 45
42 Benton St. S Riverside
Dr. Capitol St. 6 3 2.73 11 8 2 4.50 45
43 S Riverside
Dr.
Burlington
St. Myrtle Ave. 10 5 1.61 7 10 3 4.50 45
44 S 1st Ave. D St. F St. 4 2 3.20 13 4 1 4.25 44
45 Hwy 6 Heinz Rd. Scott Blvd.
SE 8 4 2.10 9 8 2 4.25 44
46 Melrose Ave.
Camp
Cardinal
Blvd.
Kennedy
Pkwy. 7 4 2.21 9 7 2 4.25 44
47 Melrose Ave Finkbine
Ln.
MacBride
Rd. 5 3 3.20 13 7 2 4.10 47
48 N Dodge St. I-80 WB
Ramp
I-80 EB
Ramp 6 3 1.94 8 6 2 3.75 48
49 Melrose Ave. Hawkeye
Park Rd.
Westwinds
Dr. 6 3 1.81 8 8 2 3.75 48
50 Park Rd. N Riverside
Dr.
Dubuque
St. 4 2 2.39 10 4 1 3.50 50
51 N Riverside
Dr. River St. Hwy 6 3 1 2.63 11 3 1 3.50 50
52 Old Hwy 218 Ruppert
Rd. Imperial Ct. 5 3 1.20 5 9 3 3.50 50
53 S Riverside
Dr. Iowa Ave. Burlington
Dr. 5 3 1.27 6 5 2 3.25 53
54 Hwy 6 Sturgis
Corner Dr. Gilbert St. 8 4 1.06 5 8 2 3.25 53
55 Hwy 1 Ruppert
Rd. Miller Ave. 4 2 1.60 7 6 2 3.25 53
56 Hwy 6 Boyrum St. Keokuk St. 5 3 1.36 6 5 2 3.25 53
57 Hwy 6 Keokuk St. Broadway
St. 5 3 1.31 6 5 2 3.25 53
58 S Riverside
Dr. Myrtle Ave. Benton St. 7 4 1.07 5 7 2 3.25 53
59 Hwy 1 Sunset St. Westport
Plaza 5 3 0.94 4 5 2 2.75 59
60 Old Hwy 218 Hwy 1 Ruppert
Rd. 3 1 1.58 7 3 1 2.50 60
61 N Dubuque
St. Foster Rd.
Taft
Speedway
St.
3 1 1.39 6 3 1 2.25 61
62 Mormon Trek
Blvd. 1st St. Hawkeye
Park Rd. 4 2 0.69 3 6 2 2.25 61
63 N Dodge St. Northgate
Dr.
I-80 WB
Ramp 3 1 0.78 4 3 1 1.75 63
64 Scott Blvd. N 1st Ave. Rochester
Ave. 3 1 0.39 2 3 1 1.25 64