Highway Safety Improvement Program

Lane departure crashes are defined as crashes involving a vehicle that traveled out of its travel lane and not occurring at an intersection, nor traveling from a median opening or driveway as determined by police officer in the crash report. Lane departure crashes include all roadway departure crashes and crashes where:

• The first harmful event or prior movement was “crossed the median/centerline;” or
•  The prior movement was “crossed median into opposing lane;” or
• The collision manner was either “head on,” “sideswipe same direction,” or “sideswipe opposite direction.”
• Lane departure crashes contributed to over half of all fatalities in the state between 2016 and 2020.
• Nearly two-thirds involved males and occurred between 3 p.m. and 3 a.m. 

Roadway departure crashes are defined as crashes involving a vehicle that traveled off the road.

• Roadway departure crashes contributed to 41% of statewide fatalities and almost 90% were single vehicle crashes.
• Driver characteristics and time-of-day occurrence were similar to that of lane departure crashes.
• Roadway departure crashes involving young drivers resulted in head-on collisions 10% of the time, which is two times higher than the average for all drivers.
• Roadway departure crashes involving older drivers resulted in head-on collisions 10% of the time, two times higher than the average for all drivers.

Intersection crashes are defined as crashes occurring at an intersection as determined by the police officer in the crash report.

• Intersection-related crashes contributed to one-third of all fatalities and serious injuries in the state between 2016 and 2020.
• Most intersection-related fatalities and injury crashes occurred between noon and midnight, with the highest peak occurring between 3 p.m. and 6 p.m. and during daylight conditions.

Pedestrian crashes are defined as crashes involving a person identified by the police officer as a “pedestrian.” Bicycle crashes are defined as crashes involving a non-motorized vehicle propelled by pedaling (bicycle, tricycle, unicycle, pedal car) and defined by the police officer as “Pedalcycle.”

• Pedestrian crashes involving young drivers occurred more commonly later in the night between 9 p.m. and midnight, while pedestrian crashes involving older drivers were found to occur earlier in the day between noon and 3 p.m.
• Male drivers between 45 to 54 years old were more likely to be involved in pedestrian related crashes than any other demographic. Pedestrian crashes showed the most overlap with intersections and alcohol-related crashes.
• Bicycle-involved crashes contributed to 3.5% of all fatalities and serious injuries between 2016 and 2020.
• Bicycle crashes most commonly involved angle and rear-end collisions and males between 55 and 64 years old.
• Pedestrian-involved crashes contributed to 14.2% of all fatalities and serious injuries between 2016 and 2020.