MAP-21, the Moving Ahead for Progress in the 21st Century Act (P.L. 112-141), was signed into law by President Obama on July 6, 2012. It is the first long-term highway authorization enacted since 2005. It sets highway safety as a national goal. 

The changes brought about by MAP-21 are extensive and impact almost every area

Evidence in a trucking case vanishes quickly. There are several computers on-board a tractor trailer these days and all have critical information which helps determine the extent of liability and what happened in a truck wreck.  One of the computers is called an event data recorder (EDR). This computer records the speed, time of braking, time