gravitystorm/openstreetmap-carto — pull request #1075 by math1985 (2014-10-18 16:35:34+00:00)
Title: Create layer of low-priority symbols

This layer contains symbols that have lower priority than text, i.e. symbols
that should not prevent the rendering of text labels.

The layer currently contains the barriers, level crossings, and mini
roundabouts.

This resolves #1046.