f6ab1d71____Regulations___VLEX_19948537__Mountinglocation
[Number and color] 2 Red plus 2 amber optional [Mounting height] As high as practicable but at least above the top of any side window opening [Device activation] Flashing alternately between 60 to 120 cycles per minute, with an activation period sufficient to allow the lamp to reach full brightness, when actuated by a manual switch.Amber lamps, when installed, may only be activated by manual or foot operation, and must be automatically deactivated and the red lamps must be automatically activated when the bus entrance door is opened. [Mountinglocation] 
On the rear cab as far apart as practicable, but in no case shall the spacing between lamps be less than 40 inchesAmber lamps, when installed, at the same height as and just inboard of the red lamp.
49 CFR 571.108 - Standard No. 108; Lamps, reflective devices, and associated equipment. - Regulations - VLEX 19948537
Mountinglocation