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Speed Limits – U.S. and Canada

Speed Limits in Canada

If you are an American and see a speed limit of “100” while travelling in Canada, that doesn’t mean you can go 100 miles/hour.  This means 100 kilometres/hour and translates to just a bit more than 60 mph. In general, you can convert from kph to mph by dividing the speed in kph by 1.6.

Converting Kilometers per Hour to Miles per Hour
Kilometers per hour Miles per hour
4025
5031
6037
8050
10062
12075

120 kilometers per hour is the fastest you can go on a Canadian highway. The province of Ontario is especially strict, with maximum speed of 100 kph.  If you are caught driving 50 kilometers per hour over the posted limit in Ontario your car will be impounded. Below are typical speed limits you will see on Canadian roads.

Common Canadian Roadway Speed Limits
Type of Driving  Kilometers per hour Miles per hour
Multi-lane highway driving110 kph66 mph
Most 2-lane highways outside cities & towns80 kph50 mph
Major roads in urban and suburban areas60 – 70 kph37 – 44 mph
Residential streets40 – 50 kph25 – 30 mph
School zones30-50 kph20-30 mph

Speed Limits in the United States

Below are typical speed limits you will see in the United States. Only a few freeways allow you to go faster than 65 miles per hour and they tend to be in long, open, stretches of roadway.

Converting Miles per Hour to Kilometer per Hour
Miles per hour Kilometers per hour
1524
2540
3048
4572
5080
5588
65105
70113
.
Common U.S. Roadway Speed Limits
Type of Driving Miles per hour Kilometers per hour
Multi-lane highway driving55 – 70 mph88 – 118 kph
Most 2-lane highways outside cities & towns55 – 65 mph88 – 105 kph
Major roads in urban and suburban areas25 – 45 mph40 – 72 kph
Residential streets25 – 35 mph40 – 56 kph
School zones15 – 25 mph23 – 40 kph

In addition to maximum speed limits, there are sometimes default minimum speed limits.  You will see that most often on freeways where the minimum speed may be 45 mph.   Most jurisdictions also have laws prohibiting speeds so low they are dangerous or impede the normal and reasonable flow of traffic.

Below is a useful calculator which will allow you to do your own conversions of miles per hour to kilometers per hour.

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