Norwich is another UK city that has a 20mph speed ordnance for all motor vehicles within city limits due to a high number of accidents, road fatalities, and ever-increasing pedestrian traffic. However, speeds of 30mph are allowed on the A147 to reduce congestion. As a rule of thumb, all UK single carriageway motorways like the A11 and the A1151 allow a maximum speed of 60mph, while dual carriageways like the A47 and the A146 increase to 70mph. Junction points are primed with CCTV and traffic cams, so be vigilant when driving your Norwich car hire through these areas. Search car hire on KAYAK