Following the 9/11 attacks, I worked a detail supporting U.S. Customs at the international border between Detroit and Windsor, Ontario. At each primary inspection lane there was a large rectangular mirror that allowed us to view the rear license plate of each vehicle. After we read each tag, the agent would key in the plate's number and state into the Custom Service's computer system and get the history on that tag.
In 2002, we saw the installation of cameras on newly erected concrete posts. This was Customs' first run at an Automatic License Plate Reader (ALPR) system. It fed into the Customs database system automatically, and the accuracy rate was solid, about 95 percent.









