California State Route 72
SR 72 highlighted in red
|Defined by Streets and Highways Code § 372|
|Maintained by Caltrans|
|Length||7.204 mi (11.594 km)
Portions of SR 72 have been relinquished to or are otherwise maintained by local or other governments, and are not included in the length.
|South end||SR 39 in La Habra|
|CR N8 in Whittier|
|North end||I-605 in Whittier|
|Counties||Orange, Los Angeles|
Route 72 officially begins at State Route 19 in Pico Rivera, but the portion between State Route 19 and Interstate 605 is not maintained by Caltrans. Caltrans maintenance of the highway begins at the junction of I-605 in Whittier The route follows Whittier Boulevard for its entire length, heading southeast through Whittier as a four-lane arterial street. SR 72 crosses with Los Angeles County Route N8 at Colima Road and ends at the intersection of SR-39 (Beach Boulevard) in La Habra. Whittier Boulevard is a major commercial corridor in Whittier, though it does not go through the city center, which is north of the highway.
The route formerly continued west under a railroad bridge near Pio Pico State Historic Park and then over the San Gabriel River as it entered Pico Rivera and met State Route 19 at Rosemead Boulevard. After a mile, the route crossed a narrow steel bridge over the Rio Hondo into Montebello. There, it continued towards Atlantic Boulevard. From there, it continued further to its end at Downey Road. Whittier Boulevard itself continues past Downey Road towards downtown Los Angeles. These segments have been relinquished back to the cities of Pico Rivera and Montebello.
Despite the fact that the route's current alignment primarily goes west along Whittier Boulevard from Beach Boulevard to I-605, SR 72 is defined in the state highway code as a north-south state route. This reflects the original alignment and length of SR 72 before the highway was shortened (see below).
California's historic El Camino Real, which connected the Alta California missions, ran along what was then U.S. Route 101. Before 1964, U.S. Route 101 continued past today's end near the East Los Angeles Interchange east onto Whittier Boulevard and south on Harbor Boulevard until it met its bypass in Anaheim. (What is now Route 5 from Los Angeles to Anaheim was the U.S. Route 101 Bypass.)
In 1964, the U.S. Route 101 designation was removed south of the East L.A. Interchange. Its routing on Whittier and Harbor Boulevards became Route 72 and was initially defined to run from Route 5 (the former bypass) to an unbuilt State Route 245, hence the route's lackluster end at Downey Road. (Route 245 was to have been a bypass connecting Route 5 with Route 60, a function that was eventually assumed by an extended Route 710.)
In 1965, with Route 245 deleted, the definition was clarified to have Route 72 end at Downey Road, which was parallel to the planned Route 245.
In 1992, the portion from Atlantic Boulevard to Downey Road was deleted.
Except where prefixed with a letter, postmiles were measured on the road as it was in 1964, based on the alignment that existed at the time, and do not necessarily reflect current mileage. R reflects a realignment in the route since then, M indicates a second realignment, L refers an overlap due to a correction or change, and T indicates postmiles classified as temporary (for a full list of prefixes, see the list of postmile definitions). Segments that remain unconstructed or have been relinquished to local control may be omitted. The numbers reset at county lines; the start and end postmiles in each county are given in the county column.
|La Habra||11.42||SR 39 – La Habra, Huntington Beach||South end of SR 72|
|Whittier||1.85||CR N8 (Colima Road) – Buena Park, West Covina|
|6.66||I-605 (San Gabriel River Freeway) – Seal Beach, Irwindale||Interchange; I-605 exit 15; north end of SR 72; road continues west as Whittier Boulevard|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi
- California Department of Transportation. "State Truck Route List". Sacramento: California Department of Transportation. Archived from the original (XLS file) on June 30, 2015. Retrieved June 30, 2015.
- Federal Highway Administration (March 25, 2015). National Highway System: Los Angeles, CA (PDF) (Map). Scale not given. Washington, DC: Federal Highway Administration. Retrieved October 13, 2017.
- Natzke, Stefan; Neathery, Mike & Adderly, Kevin (June 20, 2012). "What is the National Highway System?". National Highway System. Washington, DC: Federal Highway Administration. Retrieved July 1, 2012.
- California Department of Transportation (January 2011). "Log of Bridges on State Highways". Sacramento: California Department of Transportation.
- California Department of Transportation, All Traffic Volumes on CSHS, 2005 and 2006
- California Department of Transportation, All Traffic Volumes on CSHS, 2000