Why are some driveways and street intersections limited to right turns only?
Right turn only limitations are used to improve safety and traffic flow. In general, it is desirable to have full access median openings at quarter mile and half mile locations. Quarter mile spacing allows adequate access for good traffic signal progression, in order to provide a safer, more efficient roadway. In addition, it allows adequate space for vehicles turning left to wait in the turn lane without interfering with the through traffic. Locations with full median breaks, whether signalized or unsignalized, can degrade both safety and traffic flow as volumes increase.
