You should be able find some answers here - in a similar thread.
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.*
What's unclear about SoothingDave's explanation?
So, highway can mean two things:
1) a main road, which simply connects towns and villages, that is not a limited access road; it can be any main road
2) a limited access road, which is basically built for long-distance traffic, also to avoid towns (in this sense you could also use freeway and expressway with little, if any, difference. In British English you'd use 'motorway')
If highway means 1, then what is the difference between normal national road and highway?
What is the difference between freeway(free of charge?) and expressway?
highway
2) a limited access road, which is basically built for long-distance traffic, also to avoid towns (in this sense you could also use freeway and expressway with little, if any, difference. In British English you'd use 'motorway')
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