Where are you allowed to park on the left in the direction of travel?

In one-way streets, it is allowed to park on the left side because there is no opposing traffic to consider. Parking there does not create hazards for other vehicles.

When there are rails on the right-hand side, it indicates that the road may be intended for trams or similar vehicles. In such cases, parking on the left is permitted to avoid blocking the rails and allowing trams to operate freely.

The combination of these two scenarios (one-way streets and areas with rails) is designated in German traffic regulations to encourage safe and efficient use of the road. It is essential to recognize both instances, as parking rules are designed to promote traffic flow and safety for all road users.