Work on the portion south of Garrison was completed by February 1930.

In 1954, a section north of Fort Collins was removed, leaving only the portion south of the that point.

The parkway is a major traffic thoroughfare, especially along the portion south of the zoo.

That same year, the portion south of Tobyhanna was decommissioned to a state highway.

The portion south of Autoroute-40 no longer occurs as part of A-19.

But it did not include the small portion south of the entrance.

Lastly, the portion south of modern NY 31 was added in the late 1920s.

(The portion south of 23rd Street remained County 327).

On the portion south of Madero Street, what appears to be one building is actually two.

In 1969, the portion south of Hesperia was removed and assigned to other routes.