In Ontario, wearing a seat belt is required by law. Distances are measured in kilometres, where 1 kilometre equals 0.62 miles. For most city driving, the speed limit is 50 km/h (31 mph), while on highways, it ranges from 80 km/h to 100 km/h (50-62 mph). Gasoline is sold by the litre, and 1 U.S. gallon is equivalent to 3.785 litres. To find the U.S. price per gallon, multiply the Canadian price per litre by 3.78.