main road
n. countablen. the most important road in a city or town that connects different areas. It is usually wider and busier than the small streets that lead off it.
n. a primary thoroughfare intended for heavy traffic and connecting major locations. Typically characterised by a higher speed limit and greater width than residential or side streets.
There is a noisy café right on the main road.
If you follow the main road for three miles, you will eventually see the shopping centre on your left.
The urban planning committee proposed a series of pedestrian crossings to manage the heavy congestion that frequently occurs where the main road intersects with the old market square.
Commonly used with the preposition 'on' to describe location or 'along' to describe movement.