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2.24.9 The entire apparent surface of direction indicator lamps must be visible 15° up and 5° down. Minimum horizontal visibility requirements (of the right direction indicator lamps) are shown in the following diagram.
ASC:
| Part | Position | Viewing Angle | Other |
|---|---|---|---|
| Daytime Running Lights | must be located at the front of the vehicle at a distance at least 25% of the overall vehicle width away from the vehicle centerline and at a distance no further back than 175 mm from the absolute front of the vehicle. | 30° from center in both directions and 15° up from horizontal. | Must be white. The Daytime Running Lights / Headlamps shall be in use when it becomes necessary to use the headlamps or windshield wipers on the team’s support vehicles. |
| Front Turn Indicators | must be located at the front of the vehicle at a distance at least 25% of the overall vehicle width away from the vehicle centerline and at a distance no further back than 175 mm from the absolute front of the vehicle. | 80° from center in outwards, 45° from center in inwards and 15° up from horizontal. | Must be amber. Must flash between 60 and 120 pulses per minute. |
| Side Marker Turn Indicators | shall be mounted on each side of the vehicle between 10% and 30% of the vehicle length rearward from the absolute front of the vehicle. | 60° from perpendicular to the centerline of the vehicle in both directions and 15° up from horizontal. | Must be amber. Must flash between 60 and 120 pulses per minute. |
| Rear Brakes | must be located at the rear of the vehicle and at a distance at least 25% of the overall vehicle width away from the vehicle centerline and at a distance no further forward than 175 mm from the absolute rear of the vehicle. | 80° from center in outwards, 45° from center in inwards and 15° up from horizontal. | Must be red. It is permissible to have one set of lights per side of the car which operate as both the brake lights and turn indicators. The turn indicator operation has the priority in operation. Note that this is not permissible by WSC standards. |
| Rear Turn Indicators | must be located at the rear of the vehicle and at a distance at least 25% of the overall vehicle width away from the vehicle centerline and at a distance no further forward than 175 mm from the absolute rear of the vehicle. | 80° from center in outwards, 45° from center in inwards and 15° up from horizontal. | Must be amber amber(if separately equipped from Rear Brake Lights). Must flash between 60 and 120 pulsesper minute. |