When passing a stationary vehicle are you obliged to keep a safe distance from the vehicle?

Yes, according to Art. 23 para. 1 pt. 2 of the Road Traffic Act, when passing a stationary object, you must maintain a safe distance from the vehicle, obstacle, or pedestrian being passed. In the situation shown in the picture, where you are passing road workers, this is particularly important for their safety as they might unexpectedly step onto the roadway.