According to a 2011 ATRI study, how much does speeding 15 mph over the limit increase the likelihood of a crash?

Answer: C — 67%

Speeding has a significant impact on the likelihood of being involved in a crash. According to the 2011 study conducted by the American Transportation Research Institute (ATRI), speeding 15 miles per hour over the limit increases the likelihood of a crash by 67%. This statistic highlights the dangers associated with driving too fast, as even a slight increase in speed can substantially elevate the risk of accidents. The study’s findings align with the understanding that higher speeds reduce a driver’s ability to react to sudden changes in the driving environment, such as obstacles or the actions of other road users. Additionally, increased speed leads to longer stopping distances, which can mean the difference between avoiding a collision and being involved in one. This data emphasizes the importance of adhering to speed limits, as they are set not only for legal compliance but also for the overall safety of all road users.