This report (DOT HS 811 028) identified 131 pieces of legislation with all 50 States having at least one vehicle sanction law in 2004. Although it was difficult to obtain quantitative information on the application of vehicle sanctions, it was documented that at least 51 of the 131 laws are used regularly. Alcohol ignition interlock laws were enacted most often in the States (43), followed by vehicle forfeiture laws (31). Half of the States (25) reported having alcohol ignition interlock laws that were actively being applied on at least some of the eligible offenders. There are a number of barriers to the implementation of vehicle sanctions. These are discussed along with suggestions for improvements in their application.