HOV Lane Sign
The HOV lane sign marks a High Occupancy Vehicle lane reserved for vehicles carrying two or more people, or eligible zero-emission vehicles, during the posted hours. Single-occupant vehicles are not permitted except electric vehicles with a green plate.
Last updated: April 4, 2026
An HOV lane is a designated lane on major Ontario highways, including the 400-series, restricted to vehicles with two or more occupants. The goal is to reduce traffic by incentivizing carpooling. Zero-emission vehicles with a green licence plate are permitted regardless of the number of occupants. The restriction applies only during the hours shown on the sign, usually peak commute periods.
Quick Facts
Type
Regulatory Sign
Shape
Rectangular
Colours
White background with black text and diamond symbol
In this guide
What does the HOV Lane Sign mean?
An HOV lane is a designated lane on major Ontario highways, including the 400-series, restricted to vehicles with two or more occupants. The goal is to reduce traffic by incentivizing carpooling. Zero-emission vehicles with a green licence plate are permitted regardless of the number of occupants. The restriction applies only during the hours shown on the sign, usually peak commute periods.
What to do when you see it
Only use an HOV lane if your vehicle carries at least two people, or if you drive a zero-emission vehicle with a green Ontario plate. If you are driving alone in a regular vehicle, stay in the general-purpose lanes. Check the sign for the hours of restriction: outside those hours, any vehicle may use the lane.
Where you'll see it in Ontario
HOV lanes operate on Highway 403, Highway 404, Highway 410, Highway 417, and several other major Ontario highways. They are marked with a white diamond painted on the road surface and overhead signs. The diamond marking appears regularly along the lane to remind drivers of the restriction.
G1 test relevance
G1 questions ask candidates to identify which vehicles may use an HOV lane and during which hours. The two most important facts are: the minimum occupancy is two persons, and green-plate electric vehicles may use the lane alone. Motorcycles with one rider are also permitted in HOV lanes in Ontario.
Common mistakes drivers make
Driving alone in an HOV lane outside of permitted hours or in a non-qualifying vehicle is a common offence that carries a fine. Another mistake is entering an HOV lane and being unable to exit properly due to solid painted barriers, which can result in a traffic lane violation.
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