The phrase "main highway" refers to a major road that is wider and more important than other roads. It is the primary route for a lot of traffic and connects different places together.
Sentences with «main highway»
Lately the new Class - A properties are built along main highways and strip shopping centers. (nreionline.com)
Perth Airport is approximately 35 minutes drive from Kelmscott on main highways. (wikiaustralia.com)
The bus station is located at the fork where Route 4 splits off from main highway Route 13, close to the fresh market. (travelfish.org)