Speed limit
Videos
Speed limits on road traffic, as used in most countries, set the legal maximum speed at which vehicles may travel on a given stretch of road. Speed limits are generally indicated on a traffic sign ref
A road sign shows maximum and minimum speed limit for different types of vehicle on expressway in China. Speed limit signs are shown in kilometres per hour.
Historic New Hampshire speed limit sign
In 1920 a pastor was fined US$10 (equivalent to $346 in 2025) for "overspeeding his machine ... at a rate greater than 25 mph (40 km/h) ... in what appeared to be a reckless manner."
Example variable speed limit sign in the United States, in mph
Road safety
Videos
Road traffic safety refers to the methods and measures, such as traffic calming, to prevent road users from being killed or seriously injured. Typical road users include pedestrians, cyclists, motoris
Sidewalks, curbs and traffic signals in Hagerstown, Maryland, United States
A right-hand driving car on the right-hand side of the road in France at night
Speed limits in different areas; here unusually with only a "recommended" limit (Richtgeschwindigkeit) of 130 km/h on the Autobahn in Germany
DRIP variable message sign guiding traffic on the Dutch A13 motorway