With support and collaboration from U.S. DOT agencies, VTTI has developed strong expertise in the collection of analysis of naturalistic driving data, i.e., video and other data collected from instrumented vehicles operated by drivers over an extended period under normal driving conditions. VTTI has collected naturalistic driving data for passenger vehicles and for large trucks. Its research has influenced recent changes in FMCSA regulations that prohibit operators of large trucks and buses from engaging in text-messaging and using handheld mobile phones while driving.[1][2][3][4]