It serves primarily as an alternative route to get to and from the Downtown Los Angeles area and the San Gabriel Valley.

[citation needed] After crossing the intersection, it is labelled as North Mission Road, and follows a straight path towards the Golden State Freeway.

[citation needed] While the Los Angeles portion ends at Huntington Drive and Soto Street, there is a gap in the route.

Another portion resumes in Alhambra, at the Los Angeles-Alhambra line and continues into San Gabriel and Rosemead where it becomes Mission Drive and ends at Valley Boulevard.

[2] The bridge was constructed in 1936 as joint venture between the state, city and Pacific Electric Railway as an overpass of its Red Car system.