I think those are cargo ramps, but it's funnier to imagine that it is just an extremely steep wheelchair ramp

Jep, die voetgangerstunnel

It is also more convenient for the pedestrian than waiting for the light to change, putting themselves in danger, etc.

I very much agree with your point, but am also reminded of a snowy place a once lived that utilized these, or at least we pedestrians used these, as brief respites from the blast. I'm not sure which cleaned the steps but they did and at least one side was not treacherous. Mostly a good way to get from a bus stop to the other side of the way. Also lots of fun artwork.