(a) A state highway segment shall be designated by the department as a Safety Enhancement-Double Fine Zone if all of the following conditions have been satisfied:

1. (1) The highway segment is eligible for designation pursuant to subdivision (b).

2. (2) The Director of Transportation, in consultation with the Commissioner of the California Highway Patrol, certifies that the segment identified in subdivision (b) meets all of the following criteria:

   1. (A) The highway segment is a conventional highway or expressway and is part of the state highway system.
   2. (B) The rate of total collisions per mile per year on the segment under consideration has been at least 1.5 times the statewide average for similar roadway types during the most recent three-year period for which data are available.
   3. (C) The rate of head-on collisions per mile per year on the segment under consideration has been at least 1.5 times the statewide average for similar roadway types during the most recent three-year period for which data are available.
3. (3) The Department of the California Highway Patrol or local agency having traffic enforcement jurisdiction, as the case may be, has concurred with the designation.
4. (4) The governing board of each city, or county with respect to an unincorporated area, in which the segment is located has by resolution indicated that it supports the designation.
5. (5) An active public awareness effort to change driving behavior is ongoing either by the local agency with jurisdiction over the segment or by another state or local entity.
6. (6) Other traffic safety enhancements, including, but not limited to, increased enforcement and other roadway safety measures, are in place or are being implemented concurrent with the designation of the Safety Enhancement-Double Fine Zone.

(b) The following segments are eligible for designation as a Safety Enhancement-Double Fine Zone pursuant to subdivision (a):

State Highway Route 12 between the State Highway Route 80 junction in Solano County and the State Highway Route 5 junction in San Joaquin County.

(f)

1. (1) The department or the local authority having jurisdiction over these highway and road segments shall place and maintain the warning signs identifying these segments by stating that a “Special Safety Zone Region Begins Here” and a “Special Safety Zone Ends Here.”
2. (2) Increased penalties shall apply to violations under Section 42010 of the Vehicle Code only if appropriate signage is in place pursuant to this subdivision.
3. (3) If designation as a Safety Enhancement-Double Fine Zone is revoked pursuant to subdivision (d), the department shall be responsible for removal of all signage placed pursuant to this subdivision.

(g) Safety Enhancement-Double Fine Zones do not increase the civil liability of the state or local authority having jurisdiction over the highway segment under Division 3.6 (commencing with Section 810) of Title 1 of the Government Code or any other provision of law relating to civil liability.

1. (1) Only the base fine shall be enhanced pursuant to this section.
2. (2) Notwithstanding any other provision of law, any additional penalty, forfeiture, or assessment imposed by any other statute shall be based on the amount of the base fine before enhancement or doubling and shall not be based on the amount of the enhanced fine imposed pursuant to this section.