The following is a list of some factors that may tip police off to a drunk driver:
- Making too wide turns
- Speeding
- Stopping or turning abruptly or illegally
- Drifting into other lanes
- Swerving
- Delayed response time to traffic
- Sudden braking
- Tailgating
- Driving well below the speed limit
- Driving on the shoulder or wrong side of the road
- Almost hitting another vehicle or object
- Inconsistent signaling with driving
- Driving with no headlights