This guide is designed to help merchants and retailers partner with local law enforcement to assess their auto theft, car break-in, and vehicle vandalism problems and to develop strategies to address them. The guide walks readers through the process of understanding their car crime problem; collecting crime data; identifying potential strategies; and measuring the impact of those strategies. While each jurisdiction's problems will be different, effective strategies may include: introducing bike patrols; improving lighting; restricting pedestrian traffic; and requiring tickets to both enter and exit parking facilities.