If a driver makes a lane change when it is 2:30 a.m. and there are no other cars on the road for over a mile, but the driver does not use his turn signal, is this an unsafe lane change sufficient to allow police to stop the car? Is there a Vehicle Code violation? What if the driver makes several such lane changes and the police officer sees this from 400 yards behind? This factual scenario arose in a recent DUI case that our office handled. To read about how it was resolved, click on the following link - http://www.greghillassociates.com/lawyer-attorney-2127845.html.