Sentence:  The highway to the East Coast which ran through the borough of Ebbfield had always been a <WSD>main road</WSD> and even now, despite the vast garages, the pylons and the gaily painted factory glasshouses which had sprung up beside it, there still remained an occasional trace of past cultures. 
Meaning of the word marked with <WSD> tags:  A major urban road, off which lead many smaller streets, many of them cul-de-sacs.