For Switzerland, that distance sounds about right, tending more towards 100m (in major cities). There is bound to be a dataset somewhere: being a tiny country m

For Switzerland, that distance sounds about right, tending more towards 100m (in major cities). There is bound to be a dataset somewhere: being a tiny country means that we map everything in great detail, and the government takes these topics quite seriously. Some links to get you started: https://www.geo.admin.ch/en/geo-information-switzerland/geodata-index-inspire.html https://www.geo.admin.ch/en/geo-information-switzerland/geod... https://www.geo.admin.ch/en/geo-information-switzerland/geodata-index-inspire/infrastructure-and-communication/transport-networks.html https://www.geo.admin.ch/en/geo-information-switzerland/geod... You can also visualize a lot of the topographic data on map.geo.admin.ch, which is surprisingly useful/flexible, if not very user friendly.