Have you ever been in a row of cars being stopped by police and wondered what was going on? There's a good explanation, and it has to do with safety and traffic laws in the state.
Sobriety checkpoints are also known as DUI or DWI checkpoints. These are locations where the police or other local law enforcement can set up a stop where they can check drivers passing through the area. The purpose of this is to find drivers who are driving over the legal alcohol limit, but it's also used to find fugitives, to catch those violating state traffic laws and for checking for drugs in some instances.