Among the material I collected at City Hall during my interview with Mayor Frank Haven in January, 1971, was a then-current Chamber of Commerce road map of Covina.1 Of particular interest to me was the vicinity map on the reverse which showed a proposed freeway passing through the city limits of both Covina and West Covina.

This map detail shows only one of several possible routings that were under consideration at the time.
Beginning at the Foothill Freeway and following State Route 39 all the way to its southern terminus, the project was first referred to as the La Habra Parkway2 then later the Huntington Beach Freeway.3 It was part of a master plan adopted in 1958 by the Metropolitan Transportation Engineering Board3 which ultimately aimed to create a grid of freeways located roughly 4 miles apart.4 Had the 39 Freeway been completed as shown above, its intersection with I-10 today would be about 5-1/2 miles between I-605 and SR-57. Close enough!

Map of the 1958 Master Plan,3 courtesy of Arturo Salazar on the Freeways of Los Angeles Facebook group.
The intent of the 4-mile grid was of course ease of access to the freeway system, which sounds good on paper, but we know now that urban highways that bisect communities can have deleterious social effects on neighborhoods and negatively impact the quality of city life in general.5 All things considered, then, it was assuredly for the best that the proposal to build the 39 Freeway through the Covinas was eventually abandoned.

References:
1 Official Covina Street and Vicinity Maps, Covina Chamber of Commerce. Published by Western Map Company, 1970.
2 Map of Master Plan of Freeways. The Regional Planning Commission, County of Los Angeles, July, 1947, revised June, 1953.
3 Map of Master Plan of Freeways and Expressways. The Metropolitan Transportation Engineering Board, adopted February 28, 1958.
4 The ghosts of L.A.’s unbuilt freeways, Los Angeles Times, June 7, 2022.
5 Aiello, M. L., et al. 2025. Urban highways are barriers to social ties. Proceedings of the National Academy of Sciences, Vol. 122, No. 10, e2408937122.


