Could you please take a look if I think along the right lines?
motorway (BrE)
highway, clearway, speedway, freeway, expressway? (AmE)
semi-motorway?
expressway?
slip road (BrE?) = exit (apply to motorways and dual carriageways only?)
Which one's more commonly used:
petrol dispenser (neutral?)
petrol pump (BrE)
What do you call the 'handle'? Handle perhaps? ;)
We don't use that sign/symbol in the US.highway, clearway, speedway, freeway, expressway? (AmE)
I have never heard "clearway" used here.
A "speedway" would be a track for the racing of cars, not a road for traveling.
A "highway" need not be a "limited access, divided" road ( i.e. no traffic lights, entry and exit only via exit ramps, maximum speed limits). Any "major" road, even if it has traffic lights can be a "highway."
Freeway and expressway would usually denote a limited access road. An "interstate" would be the same.
In some areas (like mine) the major interstates near the big city are called "parkways."
Also, in the US, the word petrol is rarely used, if at all. It would be called a gas pump. The object the man is holding is called a "nozzle". I don't know of a special word for the handle on the nozzle.
aahh nozzle! Great, thanks!