California State Route 1 (SR 1) is a north–south state highway in California in American Truck Simulator that follows the Pacific Coast. The route is separated into two sections: The first section runs from the Santa Monica Freeway in Los Angeles to US 101 in San Francisco. Between Oxnard and San Luis Obispo, SR 1 is concurrent with US 101 and only the latter route is signed. The second section runs from Leggett to US 101 northeast of Leggett.
- Gas station near Los Angeles
- Rest area in Morro Bay State Park
- Rest areas in Big Sur
- Gas station and rest area near the Voltison Motors factory near Santa Cruz
- Gas station and rest area near San Francisco
In update 1.5, which changed the map scale from 1:35 to 1:20, SR 1 was extended to Los Angeles. On the rest of the route, new sections were added to accommodate the new map scale, including most of the route between San Luis Obispo and Santa Cruz.
In update 184.108.40.206, the landslide was removed and SR 1 reopened.
In update 1.36, the at-grade three-way junction with Swift Street in Santa Cruz was re-oriented from a SR 1 TOTSO to SR 1 going straight through the junction. A gas station and an International truck dealer were added on SR 1 in Santa Cruz.