State Route 45 | ||||
|---|---|---|---|---|
SR 45 highlighted in red
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| Route information | ||||
| Maintained by Caltrans | ||||
| Length | 70 mi[1] (110 km) | |||
| Existed | 1934–present | |||
| Major junctions | ||||
| South end |  SR 113atKnights Landing | |||
| Major intersections |
 SR 162 from CodoratoGlenn | |||
| North end |  SR 32atHamilton City | |||
| Location | ||||
| Country | United States | |||
| State | California | |||
| Counties | Yolo, Colusa, Glenn | |||
| Highway system | ||||
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State Route 45 (SR 45) is a state highway in the U.S. StateofCalifornia that travels in a north–south direction in the Sacramento Valley from Route 113inKnights LandingtoRoute 32inHamilton City.
The route begins at SR 113inKnights LandinginYolo County. It then heads northward and enters Colusa County, where it has a short overlap with SR 20. It then enters Glenn County, where it overlaps SR 162 through the cities of Codora and Glenn. It then continues northward to its end at SR 32inHamilton City.
SR 45 is part of the California Freeway and Expressway System,[2] but is not part of the National Highway System,[3] a network of highways that are considered essential to the country's economy, defense, and mobility by the Federal Highway Administration.[4]
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 to an overlap due to a correction or change, and T indicates postmiles classified as temporary (for a full list of prefixes, see California postmile § Official postmile definitions).[5] 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.
| County | Location | Postmile [5][1][6] | Destinations | Notes | |
|---|---|---|---|---|---|
| Yolo YOL 0.00-12.92 | Knights Landing | 0.00 | 4th Street | Continuation beyond SR 113 | |
| 0.00 | SR 113 (Locust Street) – Robbins, Yuba City, Woodland | South end of SR 45 | |||
| | 5.80 |  CR E11 (Road 98A) | |||
| Colusa COL 0.00-34.18 | | 19.85 36.79[N 1] |   SR 20 east – Meridian, Yuba City | South end of SR 20 overlap | |
| Colusa | 31.09[N 1] 19.86 |  SR 20 west (10th Street) – Williams, Clearlake | North end of SR 20 overlap | ||
| | 24.53 |   Maxwell Road to I-5 – Maxwell | |||
| Glenn GLE 0.00-23.23 | Codora | 3.06 | SR 162 east / Road 61 – Butte City, Oroville | South end of SR 162 overlap | |
| Glenn | 7.53 | SR 162 west – Willows | North end of SR 162 overlap | ||
| Hamilton City | 23.23 | SR 32 (6th Street) – Chico, Orland | North end of SR 45 | ||
| 23.23 | Canal Street (Road 203) | Continuation beyond SR 32 | |||
1.000 mi = 1.609 km; 1.000 km = 0.621 mi
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