Kingston to Chelmsford via Brockton, Framingham and Maynard.

Brief multiplex with MA 16 in Sherborn.
Brief multiplex with MA 126 in Wayland.
Brief multiplex with MA 62 in Maynard.
Brief multiplex with MA 138 in Stoughton.
Brief multiplex with MA 123 in Brockton.

In 1933, the route south of Wayland was the same; north of Wayland it is shown heading up to Concord via what is now 126. By 1939, was extended to its present length.