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 (2018 - 2020) 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.
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 Haddon Matrix (below) models basic principles to be applied to safety analysis. Each cell of the matrix represents a different area in which countermeasures can be implemented to improve traffic safety. Countermeasures applied to the pre-crash phase are designed to reduce the number of crashes. Countermeasures that are applied to the crash phase would not stop the crash, but could reduce the number or severity of injuries that occur as a result. Countermeasures focusing on the post-crash phase optimize the outcome for people with injuries, and prevent secondary events. Learn more about this approach at the Federal Highway Administration and Zero in Wisconsin.
Per year in Rock County, an average of
|6,668 drivers are involved in a crash|
|January has the highest number of crashes|
|1,240 people are injured|
|July has the highest number of injury and fatal crashes|
|26 people are killed|
|Where||8 out of 10 injured or killed people are Rock County residents|
|2 out of 10 fatal and injury crashes occur on a county or state road||17 out of 20 injured or killed people are Wisconsin residents|
|3pm-4pm is the peak time for injury and fatal crashes|
Heat map of all crashes (2018 - 2020)
Explore crash hotspots in your local community in Community Maps. If you work for a public agency, you may request a log-in to gain access to advanced search and analysis capabilities.
On an average year in Rock County, Friday has the highest number of injury and fatal crashes. In addition, over a 24-hour period, injury and fatal crashes occur most frequently between 3pm-4pm peaking at 77 crashes in total throughout the year.
Here are trends of fatal, injury, and property damage crashes over the past 5 years.
Crashes on U.S. roads are disproportionately represented in injury and fatal crashes. On roads with higher posted speed limits, there’s a higher risk for a severe injury or fatality if a crash were to occur.
Place of Residence
Place of Work
Total workers that work in Rock County:²
Of these, 82% also live in Rock County
Place of Residence
Place of Work
Total workers that live in Rock County:²
Of these, 70% also work in Rock County
Locals are more likely to be involved in a crash in Rock County as opposed to visitors. 76% of occupants injured or killed in a crash in Rock County also live in Rock County.
In Rock County, 148 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 34% of all persons killed in a crash. Statewide, this is 33% of all persons killed.
While 75% of drivers believed to be impaired by drugs or alcohol are male.
Hotspots of alcohol and drug-related crashes with an injury or fatality (2018 - 2020)
In Rock County, a driver being distracted is listed as a contributing factor in 15% of injury and fatal crashes. Statewide, this is 12% of injury and fatal crashes. Distracted driving is based on a two-year (2019-2020) trend due to a change in data fields. Below shows the breakdown of the factors in these distracted driving crashes.
Statewide seatbelt usage has been increasing over the past two decades. This past year experienced a usage rate of 89.2%, which is based on an annual seatbelt survey. Occupants not wearing a seatbelt are more likely to suffer a serious injury or fatality. Of the total statewide occupant fatalities, 1 out of 3 were not wearing a seatbelt. Statewide seatbelt usage rate reached an all time high in 2019.
People in your community can conduct their own seatbelt survey via the ‘Local Seatbelt Survey’ in the app store.
In the last 3 years in Rock County, 53 cyclists and 109 pedestrians were killed or injured in 144 crashes. The below two bar charts shows the contributing factors and where these crashes occurred.
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.
Locations of injury and fatal bicycle crashes
Locations of injury and fatal pedestrian crashes
In the last 3 years in Rock County, 177 motorcyclists were killed or injured. Of these, 62% were not wearing a helmet.
Locations of injury and fatal motorcycle crashes