Regulatory Road Sign (R3-5L)
Left Turn Only Lane Sign Meaning & Driving Rules
Mandates that all vehicles in this lane MUST make a left turn at the intersection.
Required Driver Action & Right-of-Way Protocol
If you are in this lane, you MUST turn left. If you intended to go straight, complete the turn safely and reroute.
Detailed Overview & Purpose
The Left Turn Only sign (R3-5L) designates a mandatory turning lane. Vehicles in this lane are legally required to turn left; proceeding straight through the intersection from this lane is prohibited and dangerous.
Key Standard & Origin: The word 'ONLY' below the arrow designates a mandatory turn requirement under federal traffic standards.
Where You'll Find This Sign
Overhead mast arms and curbside posts at intersection dedicated left-turn bays.
Common Driver Mistakes to Avoid
Realizing you want to go straight while in a turn-only lane and proceeding straight through, cutting off adjacent lanes.
How This Sign Appears on the DMV Knowledge & Road Test
Tests mandatory lane use rules: you must follow lane arrows once established in the turn lane.
Legal Penalties and Moving Violations
Going straight from a mandatory turn-only lane carries moving violation citations.
Sign Variations & Related Types
Right Turn Only (R3-5R)
Mandates that vehicles in the right lane must turn right.
When you encounter the official Left Turn Only Lane (R3-5L) on a roadway, what is your legal duty?
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