Speed limits in Phuket City and Thailand are set at four general standards. Specifically, 50 km/h (31 mph) in dense urban and residential areas, 80 km/h (50 mph) on larger roads in built-up areas, 90 km/h (56 mph) outside of built-up areas, and 120 km/h (75 mph) on motorways. Search rental cars on KAYAK