After crossing Carquinez Straight into Solano County via the Benicia-Martinez Bridge on Interstate 680 I made a western turn on I-780 towards mainline I-80. Interstate 780 is a 7 mile freeway which runs from I-680 in Benicia westward to I-80 in Vallejo. The corridor occupied by I-780 by a 1935 extension of Legislative Route Number 74. Contrary to what I've read elsewhere I have never been able to find a State Highway Map from 1935 up to the 1964 State Highway indicating that LRN 74 between Vallejo east to Benicia was signed as California State Route 29. The 1963 State Highway Map below does not display CA 29 between US 40 and CA 21 in Benicia. 1963 State Highway Map The original routing of LRN 74 between CA 21 in Benicia west to US 40 was on Benicia Road from starting from 2nd Street. By the 1964 Highway renumbering the freeway grade replacement of Benicia Road was completed and the route was assigned as part of I-680. 1964 State Highway Map In 1976 ...
Because every road has a story.