Roads for public transport should be drawn as Pedestrian Boardwalk unless they can be used by taxis.
If used for public transport the elevation is set to -5 (Note: Due to a bug -5 isn't available, for now please use -4.). As pedestrian area the elevation is "ground" level
The previous standard was using Walking Trails for public transport lanes. This is changed into using Pedestrian Boardwalks for public transport because both non-drivable roadtypes have now both a fix. Preference for PB because public transport lanes shouldn’t have (by accident) destinations.