Despite regulatory limits on the amount of time commercial drivers could operate without rest, accidents related to sleep deprivation continued. The Department of Transportation’s statistics indicate between 3,000 and 4,000 die each year in trucking and bus crashes in the United States. It also indicates 13% of these are caused by driver fatigue. In an attempt to address this problem, the Department’s Federal Motor Carrier Safety Administration (FMCSA) modified existing driver hours of service regulations to increase the amount of rest required. Passed on February 27, 2012, the restrictions took effect on July 1, 2013. The FMCSA indicated in a press release that it believes the new changes will only impact 15% of drivers, mostly those with the most extreme schedules.