Highway and toll road in Orange County, California
State Route 73
SR 73 highlighted in red
Route information
Maintained by Caltrans and TCA
Length
17.764 mi[1] (28.588 km)
Existed
1978 (1996 in current form)–present
Major junctions
South end
I-5 at the San Juan Capistrano–Mission Viejo–Laguna Niguel tripoint
Major intersections
SR 133 in Laguna Beach
SR 55 in Costa Mesa
North end
I-405 in Costa Mesa
Location
Country
United States
State
California
Counties
Orange
Highway system
State highways in California
Interstate
US
State
Scenic
History
Pre‑1964
Unconstructed
Deleted
Freeways
← SR 72
→ SR 74
State Route 73 (SR 73) is an approximately 17.76-mile (28.58 km)[1] state highway in Orange County, California. The southernmost 12 miles (19.31 km) of the highway is a toll road operated by the San Joaquin Hills Transportation Corridor Agency named the San Joaquin Hills Transportation Corridor, which opened in November 1996. The northernmost 5.76 miles (9.27 km) of the highway, which opened in 1978, is part of the Corona del Mar Freeway.
SR 73's southern terminus is at Interstate 5 (I-5) near the San Juan Capistrano–Mission Viejo–Laguna Niguel tripoint. Its northern terminus is at Interstate 405 (I-405) in Costa Mesa. The highway's alignment through the San Joaquin Hills follows an approximately parallel path between the Pacific Coast Highway and I-405. Currently, there are no HOV lanes for the three-mile freeway segment, but the medians have been designed with sufficient clearance for their construction should the need arise in the future.
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