Wikipedia:WikiProject U.S. Roads/California/History/Routes in adjoining states
Arizona[edit]
- I-8: part of the 1914 plan (Borderland Highway)
- I-10: added ca. 1927 (shown on 1927 federal 7% map on page 9 of [1] but not the 1927 list on page 15)
- SR 72: added between 1930 and 1935 ([2])
- I-40: part of the 1914 plan (Santa Fe Highway)
Nevada[edit]
- US 95: SR 5 in 1919
- SR 164: SR 68 by 1940
- I-15: SR 6 in 1919, but only north of Jean until 1921
- SR 161: SR 53 by 1935
- SR 16 by 1929
- SR 372: SR 52 by 1937
- SR 373: SR 29 by 1933
- SR 374: SR 58 by 1937
- SR 267: SR 72 by 1942
- SR 71 by 1942
- SR 266: SR 3 in 1917
- SR 264: SR 3A by 1933
- US 6: SR 10 by 1929
- SR 359, SR 31 by 1933; later cut back and reextended to the present crossing by 1947
- SR 3C by 1946
- SR 338: SR 22 by 1929
- US 395: SR 19 by 1929
- SR 88: SR 37 by 1934
- US 50: SR 3 in 1917
- SR 28: SR 28 by 1932?
- I-80: SR 1 in 1917
- US 395: SR 9 in 1921
- SR 81 by 1942
- SR 8 in 1921; SR 8A by 1929
Oregon[edit]
- 19 Fremont Highway: included in 1917 plan
- 50 Klamath Falls-Malin Highway: 4 from 1919 to 1939, then 50
- 426 Hatfield Highway: 1937
- 4 The Dalles-California Highway: included in 1917 plan, but moved to Malin in 1919; 420 Midland Highway in 1931; 50 Klamath Falls-Weed Highway ca. 1935?; 4 moved back in 1939
- 1 Pacific Highway: included in 1917 plan
- 25 Redwood Highway: included in 1917 plan
- 9 Oregon Coast Highway: included in 1917 plan as 3