Wikipedia:WikiProject U.S. Roads/California/History
- Legislative definitions: 1963, 1964, including a cross-reference between the two
- When each route was added to the state highway system
- Legislative act roads
- Freeway and Expressway System
- State Scenic Highway System
- Interregional Road System
- In-progress pages
- Relinquishments
- Freeway names
- Major named highways
- 1925 report
- Turnpikes
- List of relevant laws
- List of laws by route: pre-1964, post-1964
- 1933 additions
- 1937
- State Sign Routes: 1934-1964
- Full list of routes (Sign Routes only pre-1964)
- Bond issues
- Full list of pre-1964 legislative routes
- Routes in adjoining states
- Old highway names
- U.S. Routes after 1964
- Temporary signage of Interstates
- Joint Highway Districts
- Emigration trails
- Major mountain passes
- Projects
- Scans of all state statutes (awesome!)