Two-Way Left-Turn Lane on a Strip-Commercial Arterial
You are southbound at about 30 mph on a four-lane divided arterial through a strip-mall corridor in Manchester. Traffic is moderate, and the two directions are separated by a two-way left-turn lane: solid yellow lines on both edges, with white left-turn arrows painted inside the lane every few hundred feet. Your destination, a hardware store, is on your left about 60 feet north of a signalized intersection. Three things happen in sequence. First, a slow box truck ahead makes you consider ducking into the center lane and using it as a passing lane for the next 400 feet. Second, you change your mind and decide to turn left into the store instead. Third, at the signal you find yourself in the left lane, which carries a white left-turn arrow painted on the pavement and a black-on-white sign reading LEFT TURN ONLY - but you actually want to continue straight through the intersection.
1. May you use the center two-way left-turn lane to get around the box truck and continue southbound in it for several hundred feet? Explain what the lane is for and how long you may occupy it.
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No. A two-way left-turn lane is a shared turning bay, not a through lane and not a passing lane.
What the markings say. Solid yellow lines on both sides plus white arrows painted inside the lane define its only lawful uses: entering it shortly before a left turn or driveway, waiting in it for a gap in opposing traffic, and leaving it into your destination.
Why passing is dangerous here. Both directions share the lane. Using it for 400 feet of travel puts you nose-to-nose with a northbound driver who is also turning left and who reasonably expects the lane to be empty apart from turners.
Distance. Guidance limits travel in the lane to roughly the last 200-300 feet before the turn. Entering 400 feet early is exactly the behavior the solid yellow lines exist to prevent.
If you want to pass the box truck, wait for a marked passing zone or use the second through lane.
2. Describe the correct sequence for using the center lane to reach the hardware store driveway, including signaling, where to enter, and the specific hazards you must scan for.
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- Signal early and check mirror and blind spot before slowing - traffic behind you is moving at 30 mph and will not expect a sudden deceleration.
- Enter late, not early. Move into the center lane only when the driveway is close, at a shallow angle, so you occupy the lane for tens of feet rather than hundreds.
- Wait if you must. If opposing traffic is heavy you may stop in the lane - that waiting is the lane's whole purpose. Keep your wheels straight while waiting so a rear-end hit pushes you forward rather than into oncoming traffic.
- Scan both ways inside the lane. A northbound driver may be using the same lane to turn into a driveway on your side, and someone behind you may be misusing it as a merge lane.
- Cross the northbound lanes only when clear, then complete the turn without lingering in the lane.
3. At the signal you are in the LEFT TURN ONLY lane but want to go straight. What must you do, and why is treating the pavement arrow as merely advisory a poor reading of the sign package?
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You must turn left.
The lane is legally a turn lane. The white arrow painted in the lane and the black-on-white LEFT TURN ONLY sign work together. Pavement arrows are not decorative suggestions; combined with a word sign they make the lane mandatory for that movement. Proceeding straight from it would cut across the path of vehicles in the through lane, which is where a sideswipe or right-angle crash comes from.
The practical fix. If you are not yet at the stop line, signal and change into the through lane when a gap allows. If you are already committed at the stop line, make the left turn and re-route - a wrong turn costs a minute, while going straight from a turn-only lane costs a citation and possibly a collision. Do not stop in the lane to debate it; that creates a rear-end hazard behind a driver who correctly expects you to turn.