Key:surface:middle

surface:middle
Description
Describe what is in the lengthwise centre of an inhomogeneous surface  
Group: Properties
Used on these elements
Useful combination
Status: in use

When the surface of a carriageway is not the same, where the wheel tracks are, and in between: This key maps both the fact, that the surface is not homogeneous, and what covers the middle of the way.

Examples

A so-called Tractor-Path may get: highway=track + tracktype=grade3 + surface=asphalt + surface:middle=grass

A driveway may get: highway=service + service=driveway + surface=paving_stones + surface:middle=grass_paver

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