Complex sentence: Generally, wig-wags are prohibited on all vehicles except emergency vehicles, however the road rules in New South Wales, Australia, and some areas in the United States allow school buses to have flashing headlights.
Split into simpler sentences: Generally, wig-wags are prohibited on all vehicles except emergency vehicles,. However the road rules in New South Wales, Australia, and some areas in the United States allow school buses to have flashing headlights.