 These roads almost always have an odd number of lanes overall, usually five (two lanes in each direction with a middle turning lane used by both directions of flow), but three-lane and seven-lane versions are not uncommon.TWLTLs are most frequently built in suburban commercial areas where there are a large number of closely spaced driveways (or minor streets).State laws typically require drivers using the center left-turn lane to use signals, to drive slowly in that lane, and to use it solely for turning left.