A major urban road, off which lead many smaller streets, many of then cul-de-sacs(noun)
High street; Main Street(noun)
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Use "main road" in a sentence
"From the sea cliffs the ground slopes gently up towards the main road between Helston and Penzance, although it would have been little more than a track in Harry Carter's time."
"Of course there was a lane there that made a short cut back to the main road to Eau Galle, and if she hurried she might catch them before they came into town."
"In the shadow of the hills, within sight of the lake, we walked along the main road until we came to a restaurant that said PIZZERIA, and we went in and found a table and sat there hopefully until the waitress came and informed us that they served pizza only for dinner."