•
Interstate Highways and
state highways that traverse California are also defined in the California Streets and Highways code as state routes. This list does not include these state routes as they are listed separately. • The years listed reflect when the route was affected by legislative action, this is not necessarily the same year as the actual construction or signing changes to the route. •
Concurrencies are not explicitly codified in the Streets and Highways Code; such highway segments are listed on only one of the corresponding legislative route numbers. For example, the
I-10/
US 95 concurrency between
Blythe and the Arizona state line is only listed under Route 10 in the highway code while the definition of Route 95 omits the fact that it does connect to Arizona. When a highway is broken into such segments, the total length recorded by Caltrans only reflects those non-contiguous segments and does not include those overlaps that would be required to make the route continuous. Furthermore, Caltrans may not sign all concurrencies, and instead may only post the highway shields for the route with the contiguous segment in the code. • Some highways are not contiguous as the state has relinquished control of small sections to local governments. The stated length of the highway may or may not reflect the portions under local control. File:P-town.jpg|alt=Photograph|Road sign on US 6 showing that it is 3205 miles to its eastern end in
Provincetown, Massachusetts File:Looking down on US 50 from Lower Echo Lake.jpg|alt=Photograph|US 50 westbound as it winds down
Echo Summit towards the west File:U.S. Highway 95 at the Nevada California border.jpg|US 95 southbound at the California-Nevada state line File:US 97 Sign on Interstate 5.JPG|US 97 sign on I-5 in the
City of Weed File:UShwy101GaviotaRestArea.png|US 101 northbound approaching
Gaviota Tunnel through the
Santa Ynez Mountains File:US 199 south at state line.jpg|US 199 southbound at the California-Oregon state line File:US395descending intobishop.JPG|alt=Photograph|US 395 southbound descending into
Owens Valley from the
Sierra Nevada, just north of
Bishop ==Special routes==