Article 2. Official Traffic Control Devices of California Vehicle Code >> Division 11. >> Chapter 2. >> Article 2.
(a) (1) The Department of Transportation shall, after
consultation with local agencies and public hearings, adopt rules and
regulations prescribing uniform standards and specifications for all
official traffic control devices placed pursuant to this code,
including, but not limited to, stop signs, yield right-of-way signs,
speed restriction signs, railroad warning approach signs, street name
signs, lines and markings on the roadway, and stock crossing signs
placed pursuant to Section 21364.
(2) The Department of Transportation shall, after notice and
public hearing, determine and publicize the specifications for
uniform types of warning signs, lights, and devices to be placed upon
a highway by a person engaged in performing work that interferes
with or endangers the safe movement of traffic upon that highway.
(3) Only those signs, lights, and devices as are provided for in
this section shall be placed upon a highway to warn traffic of work
that is being performed on the highway.
(4) Control devices or markings installed upon traffic barriers
on or after January 1, 1984, shall conform to the uniform standards
and specifications required by this section.
(b) The Department of Transportation shall revise the California
Manual on Uniform Traffic Control Devices, as it read on January 1,
2012, to require the Department of Transportation or a local
authority to round speed limits to the nearest five miles per hour of
the 85th percentile of the free-flowing traffic. However, in cases
in which the speed limit needs to be rounded up to the nearest five
miles per hour increment of the 85th-percentile speed, the Department
of Transportation or a local authority may decide to instead round
down the speed limit to the lower five miles per hour increment, but
then the Department of Transportation or a local authority shall not
reduce the speed limit any further for any reason.
(a) Except as provided in Section 21374, only those official
traffic control devices that conform to the uniform standards and
specifications promulgated by the Department of Transportation shall
be placed upon a street or highway.
(b) Any traffic signal controller that is newly installed or
upgraded by the Department of Transportation shall be of a standard
traffic signal communication protocol capable of two-way
communications. A local authority may follow this requirement.
(c) In recognition of the state and local interests served by the
action made optional for a local authority in subdivision (b), the
Legislature encourages local agencies to continue taking the action
formerly mandated by this section. However nothing in this
subdivision may be construed to impose any liability on a local
agency that does not continue to take the formerly mandated action.