Goodbye electric trolley lines. See the tracks along the “state highway” on the bottom left, just outside Reed Ham Works? They had to be ripped up to make way for a newfangled means of transport.
This news digest from Winchester describes the Cambridge Street “big dig” of sorts, to accommodate cars. Scroll halfway down. The project also involved straightening Cambridge Street through the Burlington stretch. Before the automobile, the road meandered quite a bit, as seen in this video.