"From July to November 2008, randomly sampled vehicle license plates from vehicles in Dane, Kenosha, Milwaukee, Ozaukee, Racine, Sheboygan, Washington, and Waukesha counties were recorded. Vehicles with Wisconsin auto or truck plates and also displaying stickers were surveyed in the study. Following the in-field data collection of license plates, the vehicle license plate and VIN were matched with a database of vehicle registrations provided by WisDOT. In total, 16,923 vehicle records were included in the analysis. In the study, each vehicle surveyed was categorized based on the following criteria: the sticker on the vehicle had been expired for more than 30 days at the time of data collection, the license plate sticker displayed a date that was more recent than the registration expiration date in the WisDOT vehicle registration database, and for trucks, the bottom point of the Gross Vehicle Weight Rating (GVWR) category was higher than the registered vehicle weight class. Overall, 2.3% of vehicles surveyed were categorized as having a sticker displayed which appeared to be expired for at least 30 days at the time of data collection. Also, 1.5% of vehicles surveyed were categorized as having a license plate sticker displayed on the vehicle during data collection with a date that was more recent than the registration expiration date in the WisDOT vehicle registration database. A comparison was also made between the Gross Vehicle Weight Rating (GVWR) category for trucks to the registered vehicle weight, with 7.3% of trucks surveyed categorized as having a bottom point of the GVWR category that was higher than the registered vehicle weight, from information provided in WisDOT registration data"--Technical report documentation p.