Introduction

This document was created by the Division of State Patrol Bureau of Transportation Safety and Technical Services (BOTSTS). The data is based on three-year (2020 - 2022) trends.

The intention of this document is to assist Traffic Safety Commissions to examine their own transportation safety issues within their respective county and to identify potential countermeasures. While these crash and driver behavior trends are examined at the county level, these trends can be examined at a more local level. BOTSTS can provide this analysis and data to your local municipality.

For requests, email BOTSTS at CrashDataAnalysis@dot.wi.gov.

Zero in Wisconsin

WisDOT has adopted Zero in Wisconsin, the belief that no one should be killed or seriously injured from using the road network. The aim of Zero in Wisconsin (otherwise known as Safe System, Vision Zero or Sustainable Safety) is for a world free from road fatalities and serious injuries.






The Safe Systems Approach aims to eliminate fatal & serious injuries for all road users. It does so through a holistic view of the road system. It provides a safety-net for the user by anticipating human error and accommodating human injury tolerance. The chart shows these five elements. Here are suggestions your community can make using these elements.

Learn more about this approach at the Federal Highway Administration and Zero in Wisconsin.
















Transportation Safety

Alcohol and Drug-Impaired Driving

In Dane County, 309 people are injured or killed in a crash involving a driver believed to be impaired by drugs or alcohol, in an average year. That is 41% of all persons killed in a crash. Statewide, this is 32% of all persons killed.



While 73% of drivers believed to be impaired by drugs or alcohol are male.

Hotspots of alcohol and drug-related crashes with an injury or fatality (2020 - 2022)






















Distracted Driving

In Dane County, a driver being distracted is listed as a contributing factor in 40% of injury and fatal crashes. Statewide, this is 36% of injury and fatal crashes. Below shows the breakdown of the factors in these distracted driving crashes.

Occupant Protection

Statewide seat belt usage has been increasing over the past two decades. This past year experienced a usage rate of 87.5%, which is based on an annual seat belt survey. Occupants not wearing a seat belt are more likely to suffer a serious injury or fatality. Of the total statewide occupant fatalities, 1 out of 3 were not wearing a seat belt. Statewide seat belt usage rate reached an all time high in 2019.


People in your community can conduct their own seat belt survey via the ‘Local Seat Belt Survey’ in the app store.

Bicyclist and Pedestrian Safety

Over the last 3 years in Dane County, 274 cyclists and 310 pedestrians were killed or injured in 570 crashes. The two bar charts below shows the contributing factors and where these crashes occurred.



Let's take a look at the drivers in these 277 crashes where the bicyclist or pedestrian had 'No Improper Action'. 45% of drivers had a contributing action of Failed To Yield Right-Of-Way.

A bike or pedestrian crash is more likely to happen in an urban area, however, a fatal or serious injury crash is more likely to occur in a rural area due to higher speeds and due to further distance from a trauma center.

Explore where these bicycle and pedestrian crashes are occurring in your local community at Community Maps.




Motorcycle Safety

In the last 3 years in Dane County, 222 motorcyclists were killed or injured. Of these, 39% were not wearing a helmet.

Injury and fatal motorcycle crashes

[The type of helmet and other safety equipment worn, such as protective gear and gloves, can also impact the type of injury sustained.

216 motorcycle drivers were involved in a fatal or injury crash. 12% were believed to be impaired by drugs or alcohol. 95% were Wisconsin drivers.








Teen and Older Drivers

In Dane County, teen or older drivers make up 19% of drivers involved in a fatal or injury crash. Statewide, this is 22% of drivers in fatal and injury crashes.

Breaking this down for Dane County:

  • 1,183 teen drivers make up 10% of drivers involved in a crash and make up 4% of licensed drivers and

  • 1,273 older drivers make up 11% of drivers involved a crash and make up 17% of licensed drivers.



Injury and fatal crashes involving a teen driver Injury and fatal crashes involving an older driver





















Lane Departure Crashes

Fewer lane departure crashes occur in Dane County, out of total injury and fatal crashes, compared to the state. That is an average of 516 fatal and injury lane departure crashes per year. Colliding with a Motor Veh In Transport was the most frequent first harmful event. Breaking this up, 73% are single vehicle only, while statewide 76% are.

A lane departure crash is defined as when the driver crosses the centerline, edge line, or leaves the roadway and then usually colliding with another vehicle or an object, such as a guardrail or a tree. The cause of a lane departure crash could be a mixture of factors – speeding, being impaired by alcohol, or feeling tired.

Below shows the breakdown of the first harmful event in these lane departure crashes.

Speeding

Speeding includes both exceeding the speed limit and driving too fast for conditions. Speeding has a compounded affect in a crash; decreasing speed can reduce the crash risk, reduce injury severity, and make it possible to control the vehicle if an event were to occur. Of all fatal and injury crashes, 19% involved speed as a contributing factor resulting in 447 fatalities and injuries in an average year. Statewide, this is 20% of fatal and injury crashes.

Comparing to road type by lane miles, U.S. roads are the most disportionate road type for fatal and injury speed crashes.

Crash Type 2018 2019 2020 2021 2022 Trend
Fatal 11 5 8 15 9
Injury 402 348 327 337 304
Property Damage 1,057 1,015 786 777 846
Total 1,470 1,368 1,121 1,129 1,159 -


Here are trends of all speeding-related crashes over the past 5 years.






1 out of 4 of all crashes where speed is a factor involves a young driver.

Hotspots and analysis areas of all crashes involving a speeding driver























Appendix

Predictive Analytics

Predictive Analytics is an emerging program that uses established crash trends to identify “hotspots” in a particular locality. The program is geared to promote changes in driving culture in and around crash hotspots, with a particular focus on outreach. Utilizing a Safe Systems Approach, Predictive Analytics introduces multi-pronged solutions that involves a wide array of partners and stakeholders in traffic safety working together to reduce injury crashes.

Hotspot Selection

A county or municipality may use whatever method they decide to select their own hotspots. But utilizing Community Maps, a jurisdiction can target areas that have a demonstrated history of injury crashes. For example, using the search components on the left give us the following map, with several hotspots to choose between:





















If there is a specific issue area that a locality wants to focus on (such as impaired driving or speeding), consider using specific crash flags when generating hotspots.








Urbanization

Dane County contains most of the Madison metropolitan area. Dane County is also adjacent to the Janesville metropolitan area and the Baraboo, Watertown-Fort Atkinson, and Beaver Dam urban clusters.

Vehicle Miles of Travel (VMT)3

A crash rate of ^

VMT is a measure of the total amount of and distance of vehicle travel in a year.

In Dane County, the 2021 VMT was 5,091 million with a crash rate of 35 injury and fatal crashes per 100 million VMT, lower than the state’s rate of 39.







^Crash rate as measured by total injury and fatal crashes per 1 million vehicles miles traveled in 2021














Grants

The State Patrol Bureau of Transportation Safety and Technical Services (BOTSTS) administers federally funded overtime traffic safety grants to county task forces each year. A county task force is a group of law enforcement agencies working together to plan high visibility enforcement in their communities.


The overtime grants are awarded to agencies in task forces using a data driven targeting process. The targeting process includes a review of crash data from previous years to determine what areas have a traffic safety problem. The process is used to determine locations of concern in the areas of impaired driving, speeding, and unbelted vehicle occupants.


To save lives and reduce injuries by preventing traffic crashes, BOTSTS, in partnership with the National Highway Traffic Safety Administration (NHTSA), sponsors campaigns that mobilize hundreds of law enforcement agencies throughout the state to increase motorists’ compliance with traffic safety laws. The high-visibility law enforcement efforts are combined with effective media campaigns to get more motorists to buckle up, slow down and drive sober. The national mobilizations are Click it or Ticket and Drive Sober or Get Pulled Over.

Below are national mobilizations in which Dane County agencies ( ) participated in and overtime grants the county task force received (if any).
Agency 2021 Click It or Ticket 2022 Click It or Ticket 2021 Drive Sober or Get Pulled Over - Labor Day 2022 Drive Sober or Get Pulled Over - Labor Day 2021 Drive Sober or Get Pulled Over - Winter Holidays 2022 Drive Sober or Get Pulled Over - Winter Holidays
Belleville PD

Blue Mounds PD

Brooklyn PD

Cottage Grove PD

Cross Plains PD

Dane County SO

Dane PD

DeForest PD

Edgerton PD

Fitchburg PD

Madison PD

Madison Town PD

Maple Bluff Village PD

Marshall PD

McFarland PD

Middleton PD

Monona PD

Mount Horeb PD

Oregon PD

Shorewood Hills PD

Stoughton PD

Sun Prairie PD

UW-Madison PD

Verona PD

Waunakee PD

Task Force Impaired Driving Occupant Protection Speed Enforcement
Dane County $200,000 $115,000 $125,000
Dane County Suburban $ 60,000 $ 60,000 $ 20,000
Dane County Suburban II

$ 40,000

Abbreviations: DPS = Department of Public Safety, PD = Police Department, SO = Sheriff’s Office

Injury-to-Fatality Ratio

In Dane County, for every 57 people injured, 1 person is killed. This is the injury-to-fatality ratio and is above average from Wisconsin where the ratio is 57 to 1.

The injury-to-fatality ratio is computed by dividing the total number of crash injuries by the total number of crash fatalities. A higher ratio is more ideal since fatalities comprise a smaller proportion of total crash victims. The ratio tends to be lower in rural areas where there’s a higher proportion of county and state roads. Higher speed limits means higher crash injury severity. Also rural areas generally suffer from a longer distance to hospitals and fewer emergency response services.












Sources:
1Wisconsin Department of Transportation. Received from K. Spencer. Dec. 3, 2019. wisconsindot.gov/Documents/projects/data-plan/veh-miles/vmt2016-c.pdf
3Wisconsin Department of Transportation. “2021 Vehicles Miles of Travel (VMT) by County.” Accessed May 20, 2022. https://wisconsindot.gov/Documents/projects/data-plan/veh-miles/vmt2020.pdf