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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
40 25
50 31
60 37
80 50
100 62
120 75

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 driving 110 kph 66 mph
Most 2-lane highways outside cities & towns 80 kph 50 mph
Major roads in urban and suburban areas 60 – 70 kph 37 – 44 mph
Residential streets 40 – 50 kph 25 – 30 mph
School zones 30-50 kph 20-30 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
15 24
25 40
30 48
45 72
50 80
55 88
65 105
70 118

Common U.S. Roadway Speed Limits
Type of Driving Miles per hour Kilometers per hour
Multi-lane highway driving 55 – 70 mph 88 – 118 kph
Most 2-lane highways outside cities & towns 55 – 65 mph 88 – 105 kph
Major roads in urban and suburban areas 25 – 45 mph 40 – 72 kph
Residential streets 25 – 35 mph 40 – 56 kph
School zones 15 – 25 mph 23 – 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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