QA: Cleanup (missing) crossing ways(?)

## Case

When sidewalks are mapped separately, it is not uncommon that the are missing separate way segments for the crossing. In those cases, the part of the crossing across the street is also just a sidewalk (or path, …)

## Question

We talked about this as a QA step, but I wonder if it is actually needed…
For the analysis that we are planning, we will look at the intersection points, rather than the crossing-ways.

It is a good QA step to create clean OSM Data, of course. But it is not crucial to generate and analyse a foot network, IMO. Right?