 The report shows that aggressive driving was a contributing factor in 50% of motor vehicle crashes, and 103 people were killed in aggressive driving crashes on Idaho roadways last year. According to the Idaho Office of Highway Safety, speed limits save lives, and you can too by slowing down, buckling up, and driving engaged. Driving engaged means free from distractions, actively scanning the road ahead, and following the speed limit to safely react to any dangers that occur.