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Written by Kayla Jane Barrie Updated on Feb 26, 2025 5 mins read

Blog Understanding Construction Zone Speed Limits And Signs

Driving rules in construction zones

Construction seems to find its way to every route you drive, doesn't it? But did you know road rules change and corresponding fines for failure to follow these rules are more severe? Ignoring the rules of construction zones could leave you hefty fines and increase your car insurance quotes. Here's how you can drive safely through construction zones and which signs to pay attention to keep you, other drivers, and workers safe.

What you should know about driving in constructions zones

  • Speeding fines are doubled in construction zones.
  • You can be fined up to $500 and three demerit points for not obeying the traffic control person or posted signage.
  • A construction zone traffic infraction could increase your insurance premiums.

What is the speed limit in a construction zone?

Not all construction zones have the same speed limit. That's why it's important to pay attention to signs leading up to the area. Generally, construction zone speed limits will be between 50 km/h to 70km/h on highways. They will be considerably less on secondary or regional roads.

What is considered a construction zone?

Construction zones can be defined as areas marked with traffic control devices such as signage or pylons. These markings will be seen at the beginning and end of the zone. There may be a flag person or traffic control person to help direct the flow of traffic.

Be prepared to stop and slow down when you are driving towards a construction zone.

What to do when you drive through a construction zone

worker holding sign to slow down in construction zone

According to the MTO, roads need substantial repair every 15-25 years. As a driver in Ontario, it sure feels like it happens much more often than that, doesn't it?

It always helps to be prepared before you get into your car and start driving. Here are some tips to help you when driving through a construction zone.

  • Pay attention, share the road with work crews : The first tip to safely navigate construction zones is to look ahead and keep an eye on what is going on.
  • Plan ahead : Check your route before leaving on your GPS or 511 for the latest road closures or delays. Taking a moment to plan can help you find an alternate route or leave at a better time.
  • Slow down : Drive at the posted reduced speed limit and keep a safe distance between you and the vehicle in front of you. Sudden stops are common in construction zones.
  • Drive defensively : Expect the unexpected – defensive driving can help you navigate road surfaces and traffic patterns that will often change unexpectedly.
  • Obey all road signage : Signs in construction zones will contain important information that warns drivers about essential information such as road work, traffic conditions and closures.
  • Keep your eyes on the road : Don't let your phone or the radio distract you from looking for new signs, signals, pavement markings, or uneven pavement.

Fines for construction zones

Did you know that if you are caught speeding in a construction zone, the fines are doubled? You can be fined up to $500 in Ontario and three demerit points (or more) for not obeying the traffic control person or posted signage.

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Red car driving on country road

Do I still need to slow down if no one is working in a construction zone?

Have you ever been driving and noticed a construction zone, but there are no workers present? Do you need to slow down if there is no work being done?

Legally, yes, you should slow down in a construction zone even if workers are not present. If you are caught, you can still face fines.

Slower speeds are not only in effect to protect workers but also to protect drivers. The speed limits are determined by the type of work being done and factor in any changes in road characteristics.

For example, speed reductions in construction zones can protect drivers from hazards including :

  • Uneven road surfaces
  • Changes in alignment and narrow lanes
  • Reduced sight distance
  • Lack of shoulders or lane markings

Construction zone signs

Construction zone FAQs

You should not pass other vehicles in a construction zone due to the unpredictable conditions of the road ahead. There may be pavement work or a lane that ends. Be patient, and wait until you are out of the construction zone to pass another vehicle.

It's important to know that the fines will be doubled if you are caught speeding in a construction zone. If you are caught driving over 30km/h in a construction zone, you may face fines for driving 60 km/h – which would be classified as stunt driving, and your license could be suspended.

In addition to reduced speed, any violation in a construction zone is subject to double fines.

Driving through a construction zone can be dangerous because of debris, loose gravel, lane changes, and no shoulders.

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