Construction Speed Limit Sign
The construction speed limit sign is an orange sign showing a reduced speed limit that applies within a construction zone. Fines for exceeding this limit are doubled when workers are present.
Last updated: April 4, 2026
Construction zones in Ontario have a posted reduced speed limit that replaces the normal road speed limit. The reduced speed allows drivers to react to sudden changes in lane positions, worker movements, and equipment. In Ontario, all fines for speeding and other traffic offences in a construction zone are doubled when workers are present. This applies even if the construction site appears inactive at the time of the offence.
Quick Facts
Type
Temporary Sign
Shape
Rectangular
Colours
Orange background with black text
In this guide
What does the Construction Speed Limit Sign mean?
Construction zones in Ontario have a posted reduced speed limit that replaces the normal road speed limit. The reduced speed allows drivers to react to sudden changes in lane positions, worker movements, and equipment. In Ontario, all fines for speeding and other traffic offences in a construction zone are doubled when workers are present. This applies even if the construction site appears inactive at the time of the offence.
What to do when you see it
Reduce speed to the posted construction zone limit as soon as you see the sign. Maintain that speed throughout the zone. Do not exceed it even when the road appears clear of workers. The reduced speed zone begins and ends at the signs: outside the zone, the normal speed applies.
Where you'll see it in Ontario
Construction speed limit signs are placed at the start of all active construction zones in Ontario, after the road work ahead sign and at intervals through the zone. The speed zone ends when a sign reinstating the normal speed appears.
G1 test relevance
Construction zone speed limits are tested in the G1 exam. Key facts: the reduced speed is mandatory, not advisory; doubled fines apply when workers are present; and the zone extends to the end sign, not just the area where workers are visible.
Common mistakes drivers make
Speeding up as soon as workers are no longer visible but before the end of zone sign is a common mistake. The reduced speed and doubled fines apply throughout the designated construction zone.
Related Signs
Construction Zone Sign
The construction zone sign marks an area where road construction or maintenance work is underway. Reduced speed limits apply, fines are doubled for all offences, and drivers must obey all temporary traffic controls.
Learn moreRoad Work Ahead Sign
The road work ahead sign is an orange diamond sign that gives advance warning of a construction zone ahead. It signals drivers to slow down and prepare for changing road conditions, lane closures, or worker presence.
Learn moreFlagger Ahead Sign
The flagger ahead sign warns that a traffic control person (flagger) is directing traffic ahead in or near a construction zone. Drivers must obey all flagger directions, which have the same legal authority as traffic signals.
Learn moreSpeed Limit Sign
The speed limit sign is a white rectangular sign showing the maximum legal speed in kilometres per hour for that section of road. Drivers must not exceed the posted number under normal conditions.
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