No Left Turn Sign
The no left turn sign is a white square regulatory sign showing a black left-turn arrow inside a red circle with a red diagonal slash through it. It means you are prohibited from making a left turn at the intersection where it's posted. No left turn restrictions are commonly placed at intersections where left turns would be dangerous due to limited visibility, heavy oncoming traffic, or complex traffic patterns. They're also used to manage traffic flow — prohibiting left turns reduces the number of traffic conflicts at an intersection and can significantly improve traffic flow. Some no left turn signs only apply during certain hours, such as rush hour, and will have time restrictions listed on the sign. In those cases, left turns are allowed outside the posted hours. When you encounter a no left turn sign and need to go left, you'll need to find an alternate route — often by making three right turns around the block or continuing to the next intersection where left turns are permitted. Some intersections have signs directing you to make a U-turn at the next intersection instead of turning left.
Rules & What to Do
Do not make a left turn where this sign is posted. Check for time restrictions — some no left turn signs apply only during certain hours. Find an alternate route such as three right turns or a legal U-turn at another location. Obey this sign even if there seems to be a gap in traffic.
Penalties
Making an illegal left turn carries fines of $100-$300 and 2-3 points on your driving record. If the illegal turn causes an accident, you'll be found at fault with increased penalties.
For Commercial Drivers
No left turn restrictions are especially important for CDL drivers. Left turns in commercial vehicles are already more dangerous than right turns due to the wider turning radius and the time spent crossing oncoming traffic. When a no left turn sign is posted, find a route that allows right turns instead. Remember that commercial vehicles turning left at busy intersections block traffic for extended periods, which is one reason these restrictions are often in place.
Frequently Asked Questions
What does the no left turn sign mean?
The no left turn sign means you cannot turn left at that intersection. Find an alternate route — you can often go around the block with three right turns to achieve the same direction.
Can you turn left if the no left turn sign has time restrictions?
Yes, if the sign lists specific hours (like 'NO LEFT TURN 7AM-9AM'), left turns are allowed outside those hours. Always check the full sign for time restrictions.