Speed limits within the city of Bath are set at 20mph. You can drive faster along carriageways like the A367 and A3039, usually between 30mph and 50mph. On the A4 outside of the city you may proceed at a maximum speed of 60mph, but this decreases as it traverses through the downtown area. The speed limit along motorways like the M4 is set at 70mph. Major junction points always have traffic cameras and CCTV installed so reduce speed on the approach to avoid incidents or fines. Search rental cars on KAYAK