100Operation and performance of warning lights

100 Operation and performance of warning lights

(1)  This regulation applies if a bus has been fitted with warning lights as required under regulation 98 .

(2)  When operating, a warning light must display regular flashes of yellow light.

(3)  The warning lights at the same end of the bus must flash alternately at a rate of at least 90, and not more than 180, flashes per minute.

(4)  Unless the driver has turned the warning lights off, they must operate automatically when a door on the bus opens and for at least 10, and not more than 20, seconds after all the doors on the bus have closed.

(5)  The bus must have a visible or audible signal that tells the driver when the warning lights are operating.

(6)  The bus must be fitted with a switch that allows the driver to turn the warning lights off.

(7)  A warning light must have –

(a) an effective lit lens area of at least 60 square centimetres; and

(b) a luminous intensity, in candela, of at least the values specified in the following table when measured at the angles specified in the table:

| | Vertical angle from centre of light (degrees) | Horizontal angle from centre of light (degrees) |

| | | -30 | -20 | -10 | -5 | 0 | 5 | 10 | 20 | 30 | | 1. | 10 | | | | 50 | 80 | 50 | | | | | 2. | 5 | | 180 | 320 | 350 | 450 | 350 | 320 | 180 | | | 3. | 0 | 75 | 450 | 1 000 | 1 250 | 1 500 | 1 250 | 1 000 | 450 | 75 | | 4. | -5 | 40 | 270 | 450 | 570 | 600 | 570 | 450 | 270 | 40 | | 5. | -10 | | | | 75 | 75 | 75 | | | |

(8)  For subregulation (7)(b) , the luminous intensity of a light is to be measured in accordance with the test method specified in third edition ADR 6.