Keep in mind that speed limits are usually indicated in kilometers per hour (km/h) in South Africa. In built-up urban areas, the speed limit is typically around 60 to 80 km/h (37 to 50 mph). The speed limit in residential areas is often 40 to 60 km/h (24 to 37 mph). The speed limit is generally 100 km/h (62 mph) on two-lane rural roads outside of built-up areas. On highways and freeways, the speed limit is usually 120 km/h (74 mph). Some sections of major highways might have different speed limits posted due to specific conditions. Search rental cars on KAYAK