| 5.9.1. | Visibility of red light towards the front: a red lamp must not be directly visible to an observer moving in zone 1 of a transverse plane situated 25 m forward of the foremost point on the vehicle; | a0c0 |
| 5.9.1. | Visibility of red light towards the front: a red lamp must not be directly visible to an observer moving in zone 1 of a transverse plane situated 25 m forward of the foremost point on the vehicle; | a0c0 |