Nils
Hmm, wo steht das denn? In Key:sidewalk heißt es:
"The sidewalk=* key can be used to indicate the presence or absence of a sidewalk (pavement/footway) beside a street where the sidewalk runs parallel to the carriageway. Instead, it is recommended to represent the sidewalk as a separate way, if the sidewalk is not just attached with a kerb but separated by a road verge or other barriers. See Sidewalks for more details and a comparison of the two tagging approaches."