In the UK it's "You MUST NOT park on a road at night facing against the direction of the traffic flow unless in a recognised parking space." Source: https://ww

In the UK it's "You MUST NOT park on a road at night facing against the direction of the traffic flow unless in a recognised parking space." Source: https://www.gov.uk/guidance/the-highway-code/waiting-and-parking-238-to-252 https://www.gov.uk/guidance/the-highway-code/waiting-and-par... It's all to do with visibility. The rear light clusters have reflectors built in to them, the front light clusters do not.