Are there only 2 Lanes possible?
Highway in normal everyday usage just means a paved road that goes through more than one town.
I grew up a few blocks from a major highway that was just two lanes at the time. A highway can have more lanes also.... the directions can be together or divided.
For specialists there are probably more precise terms, but that's the baseline.
Motorway to Hell or Heave
Or the great hit "Life is a Dual Carriageway"....
And "My way or the motorway!" doesn't quite cut it either...
Nice song...
youtube.com/watch?v=U3sMjm9Eloo