When trolleys ruled the roads

The Boston City Archives recently posted a collection of photos of Boston street cars, including this photo of trolleys lined up in Copley Square for the School Boy Parade on June 6, 1937, and a photo of the scene on Tremont Street around 1895 - two years before the first subway tunnel in America opened underneath Tremont:

There are also some photos of horse-drawn trolleys.

The BPL also has an online collection of trolley photos, including crashes.