8. 10 11
Map1:CrashesbySeverity
Map 2 & 3: Crashes in Ann Arbor and Ypsilanti by Severity
Map 2 Crashes in Ann Arbor by Severity
Map 3 Crashes in Ypsilanti by Severity
Source:RoadsoftGIS
Source: Roadsoft GIS
Source: Roadsoft GIS

9. 18 19
Map4:BicycleandPedestrianCrashes
Map 5 & 6: Bicycle and Pedestrian Crashes in Ann Arbor and Ypsilanti
Map 5 Bicycle and Pedestrian Crashes in Ann Arbor
Map 6 Bicycle and Pedestrian Crashes in Ypsilanti
Source: Roadsoft GIS
Source: Roadsoft GIS
Source:RoadsoftGIS

10. 6 7
Chart 3 graphically depicts crash types as a percent of total crashes. Rear End crashes, the most
common crash type, made up 32.5% of the Washtenaw County crashes and Single Motor Vehicle
crashes were the next most common at 26.4% of all crashes. Table 1 shows crash type by percent of
crashes; table 2 lists crash types by municipality.
Crash Type Percent Total
Single motor vehicle 26.40% 2970
Head-on 1.19% 134
Head-on / left turn 1.29% 145
Angle 16.33% 1836
Rear-end 32.50% 3654
Rear-end left turn 0.60% 67
Rear-end right turn 0.70% 79
Sideswipe same direction 13.05% 1467
Sideswipe opposite direction 2.12% 238
Other / unknown 5.80% 652
Uncoded & errors 0.00% 0
Total Crashes 100.00% 11242
Table 1: Crash type by percent of crashes
Angle Head-
on
Head-on /
Left Turn
Other /
Unknown
Rear-
end
Rear-end
Left Turn
Rear-
end Right
Turn
Sideswipe
Opposite
Direction
Sideswi-
pe Same
Direction
Single
Motor
Vehicle
Grand
Total
Cities and Villages
Ann Arbor 752 37 53 305 1479 16 29 74 676 406 3827
Barton Hills 0 0 0 0 0 0 0 0 0 4 4
Chelsea 28 2 2 24 41 4 3 3 12 29 148
Dexter 25 2 1 7 29 1 0 5 3 14 87
Manchester 10 2 0 3 5 1 0 4 3 15 43
Milan 12 0 1 18 10 1 0 1 5 4 52
Saline 38 4 6 11 79 3 2 4 21 25 193
Ypsilanti 187 13 10 68 278 4 6 13 170 100 849
Total 1052 60 73 436 1921 30 40 104 890 597 5203
Townships
Ann Arbor Twp. 27 6 6 21 255 2 5 4 90 261 677
Augusta Twp. 11 3 1 2 14 2 1 4 2 47 87
Bridgewater
Twp.
0 0 0 1 2 0 0 2 0 49 54
Dexter Twp. 7 3 2 1 11 2 0 3 2 78 109
Freedom Twp. 2 0 0 0 1 0 0 1 1 21 26
Lima Twp. 5 1 2 4 41 1 0 14 101 169
Lodi Twp. 11 1 2 16 1 0 4 3 53 91
Lyndon Twp. 4 1 1 2 4 0 0 1 3 39 55
Manchester
Twp.
3 0 0 1 5 0 0 0 1 55 65
Northfield Twp. 17 2 3 13 95 3 0 5 31 156 325
Pittsfield Twp. 265 17 14 51 546 5 8 22 140 300 1368
Salem Twp. 13 1 0 2 28 1 1 7 12 85 150
Saline Twp. 3 1 1 1 4 1 0 1 2 33 47
Scio Twp. 78 7 6 20 126 7 6 14 57 259 580
Sharon Twp. 5 1 1 3 7 1 0 2 3 42 65
Superior Twp. 43 3 5 7 89 4 2 12 23 146 334
Sylvan Twp. 12 1 1 6 28 0 0 5 15 144 212
Webster Twp. 9 3 2 4 18 0 0 11 5 89 141
York Twp. 22 1 1 7 43 1 3 4 12 128 222
Ypsilanti Twp. 247 22 26 68 400 7 12 32 161 287 1262
Total 784 74 72 216 1733 37 39 134 577 2373 6039
Washtenaw
county
1836 134 145 652 3654 67 79 238 1467 2970 11242
Table 2: Crash Types by Municipality
Chart 3: Washtenaw County
Crashes by Type
Source: MichiganTrafficCrashFacts.org
58.9% of crashes in 2014 were
either single motor vehicle or rear-
end crashes
Source: MichiganTrafficCrashFacts.org
Total crashes
Single motor vehicle or rear-end crashes

11. 14 15
Driver Condition Count Percent
Sober 10922 97.2%
Intoxicated (BAC > 0.08) 320 2.8%
Total Crashes 11242 100.0%
Table 5: Crashes Involving Alcohol
Alcohol Related Crashes
Police officers indicate if alcohol was a factor for each driver involved in a crash. In 2003, the State of
Michigan revised its drunken driving laws from Driving under the Influence of Liquor (DUIL) to the
violation of Operating While Intoxicated (OWI). With the name change there was a Blood Alcohol
Concentration (BAC) reduction from 0.10 to 0.08. The law includes a“zero-tolerance”policy for those
under the age of 21. This means that a BAC level at or above 0.02 is illegal for those under 21 years
of age. Commercial operators are in violation of the OWI law with a BAC of 0.04.
Table 5 shows the number of crashes involving alcohol. The alcohol use data shows that 2.8% of
drivers involved in Washtenaw County crashes were above the OWI standard of .08 BAC or .04 BAC if
operating a commercial vehicle.
Source: www.MichiganTrafficCrashFacts.org
Injury Severity Sober Alcohol Use Total Percent
Alcohol
Use
Alcohol
Use
Percent
Alcohol Use
Fatal 21 8 29 27.6% 8 27.6%
Incapacitating injury 101 25 126 19.8% 25 19.8%
Non-incapacitating injury 424 48 472 10.2% 48 10.2%
Possible injury 1184 64 1248 5.1% 64 5.1%
No injury 9192 175 9367 1.9% 175 1.9%
Total Injury Crashes 1730 145 1875 7.7% 145 7.7%
Table 6: Crashes Involving Alcohol by Injury Severity
Source: www.MichiganTrafficCrashFacts.org
2.8% of all crashes involved alcohol but 7.7% of injury crashes involved alcohol
The data in Table 6 reveals the injury impact of alcohol use while driving. In crashes with a fatality,
27.6% involved alcohol. For crashes where injuries occurred, 7.7% involved alcohol. Injury severity
increases significantly when alcohol is a factor.
Pedestrian and Bicycle Related Crashes
As the use of non-motorized transportation increases throughout the county, it is important to
document bicycle and pedestrian crashes. Below Tables 7 and 8 provide bicycle and pedestrian
crashes by injury. Table 9 identifies whether a non-motorized facility was available where the crash
occurred. Table 10 identifies vehicular crashes involving a bicycle or pedestrian by municipality.
Both bicycle and pedestrian crashes occurred more frequently in more urban communities.
Bicyclist involved % of Bicycle Crashes
Fatal 1 1.0%
Incapacitating injury 10 10.2%
Nonincapacitating injury 43 43.9%
Possible injury 26 26.5%
No injury 18 18.4%
Total Bicyclist Injury Crashes 80 81.6%
Table 7: Bicycle Crash Injuries
Source: www.MichiganTrafficCrashFacts.org
% of Bicycle Crashes % of Pedestrian Crashes
5.9%1%Chart 5: Share
of bicyclist/
pedestrian injury
crashes in the
total bicycle/
pedestrian
crashes