In the UK it's different again. We use 'motorway' to refer to the largest roads we have in terms of lanes - usually 3 or 4, and distance you can travel on them - up to several hundred miles. These roads have a speed limit of 70 mph. These roads have no traffic lights, stop signs, roundabouts and so on.
We then have dual-carriage-ways, which usually have 2 or 3 lanes and have a speed limit of up to 50 mph, however these roads have traffic lights and the occasional roundabout.
Then we have normal roads, with a speed limit of 30 mph, slightly less near schools, with traffic lights, zebra-crossings, pelican-crossings, roundabout, sleeping policeman and the like!