Speed limits in China
Expressways in China were limited to 120 km/h (75 mph) since the PRC's first road-related law, the Road Traffic Safety Law of the People's Republic of China, came into effect on May 1, 2004.
Semi-expressways and city express routes (called kuàisù gōnglù (Chinese: 快速公路) in Chinese, meaning "high speed public road") generally have lower speed limits of 100 km/h (62 mph): in some cases the speed limit may be lower.
On China National Highways (which are not expressways), a common speed limit is 80 km/h (50 mph). In some localities, speed limits may drop to 40 km/h (25 mph).
On some designated "fast through routes" in cities, speed limits are up to 80 km/h (50 mph). Otherwise, speed limits are 70 km/h (43 mph) on roads with two uninterrupted yellow lines and 60 km/h (37 mph) or 50 km/h (31 mph) otherwise. Signage in towns and on expressways is often present.
Minimum speed limits on expressways vary. A general minimum speed limit of 60 km/h (37 mph) is in force at all times (although traffic jams thwart it).