Specifications include, but are not limited to: 3.1.4.2.1 BRAKES: Electronic Stability Control will be required on all school buses. Exceptions: Type A and D Buses 3.1.4.2.2 STORAGE COMPARTMENT: Two metal compartments, one on each side of the bus, of adequate strength and capacity for storage of tire chains, tow chains, and such tools as may be necessary for minor repairs shall be provided. Such storage compartment shall be located outside passenger compartment. The dimensions of this compartment shall be a minimum of 25" long, 16" wide and 12" high. EXCEPTION: Only one storage compartment is required for Type A buses and smaller lift equipped buses which the design may not allow for the installation of two compartments. A single compartment may be installed on the left or right side and may be manufactures standard size. School buses with larger luggage compartments are exempt from this standard. A door with locks keyed alike, as well as a proper latch, shall be provided. Such compartment shall be constructed of highly non-corrosive material, and provision for drainage of water resulting from snow and ice on tire chains shall be provided. 3.1.4.2.3 ROOF MOUNTED STROBE LAMP: A strobe lamp, white in color, shall be mounted on the roof of the school bus. The lamp shall be a maximum of 5" in height, located on the center line of the roof four to six feet from the rear of the bus, and rear of the roof hatch. The strobe lamp shall be a double flashing Class 2, with a minimum of 10 joules when using an incandescent lamp. An LED strobe light is permissible as a class 1 double flashing light. 3.1.4.2.4 BATTERY: Diesel Power: Three Group 31 batteries with a minimum of 1950 cold cranking amps (CCA) total are required. EXCEPTION: Type A gasoline-powered buses shall have two (2) batteries.