Section 22452.

(a) Subdivisions (b) and (d) apply to the operation of the following vehicles:

(1) A bus or farm labor vehicle carrying passengers.

(2) A motortruck transporting employees in addition to those riding in the cab.

(3) A schoolbus and a school pupil activity bus transporting school pupils, except as otherwise provided in paragraph (4) of subdivision (d).

(4) A commercial motor vehicle transporting any quantity of a Division 2.3 chlorine, as classified by Title 49 of the Code of Federal Regulations.

(5) A commercial motor vehicle that is required to be marked or placarded in accordance with the regulations of Title 49 of the Code of Federal Regulations with one of the following federal classifications:

(A) Division 1.1.

(B) Division 1.2, or Division 1.3.

(C) Division 2.3 Poison gas.

(D) Division 4.3.

(E) Class 7.

(F) Class 3 Flammable.

(G) Division 5.1.

(H) Division 2.2.

(I) Division 2.3 Chlorine.

(J) Division 6.1 Poison.

(K) Division 2.2 Oxygen.

(L) Division 2.1.

(M) Class 3 Combustible liquid.

(N) Division 4.1.

(O) Division 5.1.

(P) Division 5.2.

(Q) Class 8.

(R) Class Division 1.4.

(S) A cargo tank motor vehicle, whether loaded or empty, used for the transportation of a hazardous material, as defined in Parts 107 to 180, inclusive, of Title 49 of the Code of Federal Regulations.

(6) A cargo tank motor vehicle transporting a commodity that at the time of loading has a temperature above its flashpoint, as determined under Section 173.120 o.

(7) A cargo tank motor vehicle, whether loaded or empty, transporting a commodity under exemption in accordance with Subpart B of Part 107 of Title 49 of the Code of Federal Regulations.

(b) Before traversing a railroad grade crossing, the driver of a vehicle described in subdivision (a) shall stop that vehicle not less than 15 nor more than 50 feet from the nearest rail of the track and while so stopped shall listen, and look in both directions along the track, for an approaching train and for signals indicating the approach of a train, and shall not proceed until he or she can do so safely. Upon proceeding, the gears shall not be shifted manually while crossing the tracks.

(c) The driver of a commercial motor vehicle, other than those listed in subdivision (a), upon approaching a railroad grade crossing, shall be driven at a rate of speed that allows the commercial vehicle to stop before reaching the nearest rail of that crossing, and shall not be driven upon, or over, the crossing until due caution is taken to ascertain that the course is clear.

(d) A stop need not be made at a crossing in the following circumstances:

(1) Of railroad tracks running along and upon the roadway within a business or residence district.

(2) Where a traffic officer or an official traffic control signal directs traffic to proceed.

(3) Where an exempt sign was authorized by the Public Utilities Commission prior to January 1, 1978.

(4) Where an official railroad crossing stop exempt sign in compliance with Section 21400 has been placed by the Department of Transportation or a local authority pursuant to Section 22452.5. This paragraph does not apply with respect to a schoolbus or to a school pupil activity bus transporting school pupils.

(Amended by Stats. 2010, Ch. 491, Sec. 41. Effective January 1, 2011.)