More than 12,000 deaths — 29% of all crash fatalities — occurred in speed-related crashes in 2021. High speeds make a crash more likely because drivers have less time to react and because it requires a longer distance to stop or slow down. They also make collisions more deadly because modest increases in speed cause large increases in crash energy.
Raising speed limits leads to more deaths. People often drive faster than the speed limit, and if the limit is raised, they will go faster still. Research shows that when speed limits are raised, speeds go up, as do fatal crashes. By the same token, lowering speed limits cuts injury crashes.
Speed safety cameras are an important tool. Numerous studies have shown that cameras reduce speeds and crashes on all types of roads.
Intelligent speed assistance (ISA) and speed limiters can help make a future with zero traffic fatalities a reality.
December 6, 2023
In downtown Seattle, lowering default speed limits reduced the likelihood that a crash would involve an injury by a fifth on arterial roads.
March 28, 2023