The speed limits in Belfast differ according to the type of road you're on as well as the traffic and pedestrian conditions. You can drive up to 30 mph in most built-up areas, but look out for speed limit signs all the time, as some areas are designated as 20 mph zones. Outside of the built-up areas of the city you can drive at 60 mph. If you're setting out on a road trip from Belfast, you can travel at up to 70 mph on the motorways and dual carriageways.