> accumulated rubber from those landings
Rubber accumulation on runways is a normal and expected situation. Part of runway maintenance at airports serving larger aircraft includes regular removal of the rubber using high pressure water or chemicals.
Rubber accumulation on runways is a normal and expected situation. Part of runway maintenance at airports serving larger aircraft includes regular removal of the rubber using high pressure water or chemicals.
Here's a snapshot of one of the Zurich runways: https://www.google.com/maps/@47.4792249,8.5411849,660m/data=...
Scroll a little NW or SE to see what the actual color of the runway is underneath all the rubber.