The Roadway and Lane Departures emphasis area encompasses two crash types pertaining to difficulties with lane keeping: single motor vehicles that run off the road (SVROR) and head-on collisions. SVROR describes a crash where only one vehicle is involved and the first harmful event impact occurred on the shoulder, beyond the shoulder, or in the median of the roadway. Head-on crashes involve two motor vehicles traveling straight and in opposite directions prior to impact.
These types of crashes were the identified crash type for 9,560 fatal crashes (45 percent of all fatal crashes) and 30,766 serious injury crashes (34 percent of all serious injury crashes) from 2010–2016.
of fatalities were associated with a crash involving an roadway or lane departure
Roadway and Lane Departure Fatalities and Serious Injuries (2014–2019)
Roadway and lane departure related fatalities compared to total statewide fatalities due to motor vehicle crashes from 2014 to 2019. SHSP was implemented between 2016 and 2017.
Roadway and lane departure related suspected serious injures compared to total statewide suspected serious injuries due to motor vehicle crashes from 2014 to 2019. SHSP was implemented between 2016 and 2017.
Roadway Departure Fatal and Serious Crashes Summary
Day / Night
50% / 50%
Fatal and Serious Injury Roadway and Lane Departure Crashes
Roadway Departure Fatal and Serious Crashes by System and Functional Class
Fatal and Serious Injury Departure Crashes
First Harmful Event in Fatal and Serious Injury Crashes
Proportion of Drivers in Fatal and Serious Crashes Involving Roadway and Lane Departures Relative to the Proportion of the Population by Age and Gender
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Analyze roadway and lane departure crashes and roadway characteristics using the new safety methodologies (e.g., HSM and systemic approaches).