[2] In 1906, the streetcar lines were leased to the Consolidated Railway, which later became the Connecticut Company, a subsidiary of the New York, New Haven and Hartford Railroad.
Increased competition from improved roads and more affordable automobiles began to take its toll on the trolley lines.
Independent operation resumed in 1936 when Connecticut Company was no longer able to maintain lease payments due to parent New Haven entering receivership.
All local streetcar operations in Waterbury ended on May 22, 1937, and the route to New Haven closed a month later.
[3] Connecticut Railway and Lighting Company bus operation continued over many of the same routes for years.