Comment by lorenzhs

That means "don't step into traffic". It doesn't mean "you're not allowed to cross the road unless there's a pedestrian crossing". Crossing the road outside of marked pedestrian crossings is perfectly legal here (Germany).

"(3) Persons on foot shall rapidly cross lanes on the shortest path transverse to the direction of travel, taking into account vehicle traffic. If traffic density, speed, visibility or traffic flow so require, a carriageway may only be crossed at crossings or junctions, at traffic lights within markings, at pedestrian crossing aids or on pedestrian crossings (sign 293). If the carriageway is crossed at crossings or junctions, pedestrian crossings or markings at traffic lights shall always be used." - translated with deepl from https://www.gesetze-im-internet.de/stvo_2013/__25.html