No Left Turn Sign
The no left turn sign prohibits drivers from making a left turn at that intersection or road section. The sign may apply at all times or only during the hours posted below the symbol.
Last updated: April 4, 2026
A no left turn sign is a regulatory sign that means you cannot turn your vehicle left at that location. It may be in effect at all times or only during specific hours, such as rush hour periods. The restriction exists to reduce conflicts with oncoming traffic, transit vehicles, cyclists, or pedestrians at complex or busy intersections.
Quick Facts
Type
Regulatory Sign
Shape
Rectangular with circular symbol
Colours
White background, black left-turn arrow with red circle and diagonal bar
In this guide
What does the No Left Turn Sign mean?
A no left turn sign is a regulatory sign that means you cannot turn your vehicle left at that location. It may be in effect at all times or only during specific hours, such as rush hour periods. The restriction exists to reduce conflicts with oncoming traffic, transit vehicles, cyclists, or pedestrians at complex or busy intersections.
What to do when you see it
Do not turn left when this sign is posted. Make a right turn instead and navigate around the block, or find an alternative route. If the sign shows time restrictions, turning left is permitted outside those hours. Always check for time restrictions on the sign before choosing your route.
Where you'll see it in Ontario
No left turn signs are common at busy urban intersections in Toronto and Vaughan where left turns would block transit lanes, at T-intersections where a left turn creates a dangerous merge, on one-way streets, and during peak hours at intersections where left-turning vehicles cause significant delays.
G1 test relevance
G1 questions ask candidates to identify no left turn signs and understand that time-restricted signs only apply during stated hours. Road test examiners watch for candidates who attempt prohibited turns, which can result in immediate test failure.
Common mistakes drivers make
Ignoring the hours listed on the sign is a common error. Drivers see the red circle and assume the restriction applies at all times. Another mistake is making a left turn from the wrong lane to avoid the sign, which is also an offence.
Related Signs
No Right Turn Sign
The no right turn sign prohibits drivers from making a right turn at that intersection. When posted, it also overrides the default Ontario rule that allows right turns on a red light after stopping.
Learn moreNo U-Turn Sign
The no U-turn sign prohibits drivers from making a U-turn at that specific location. U-turns must only be made when safe and not prohibited by a sign or by the Highway Traffic Act.
Learn moreOne Way Sign
The one way sign indicates that traffic on that road travels in only one direction. All vehicles must travel in the direction shown by the arrow, and driving against the arrow is illegal.
Learn moreLane Use Control Sign
Lane use control signs use arrows to show which manoeuvres are permitted from each lane at an intersection. Drivers must follow the arrow in the lane they occupy.
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