JOSM Preferences → Plugins → sidewalks

Enter the mode via Mode → Sidewalk Mode.

Once in the mode, you can start mapping sidewalks. It works in a similar manner to the Draw mode with some special actions for sidewalks. Of specific note:

• When adding nodes to a way with highway=footway, if the footway crosses a road and is sufficiently short, a crossing way will be created. It is recommended to put a node where the sidewalk stops and starts on either side of the road.

When adding tags to a crossing way or node, common crossing tags will be copied from the edited way or node to the attached node or way. Current keys that are synchronized:

• bicycle
• crossing
• crossing:continuous
• crossing:markings
• crossing:signals
• crossing_ref
• cycleway
• flashing_lights
• horse
• traffic_signals:sound
• traffic_signals:vibration

Data → Create parallel sidewalks

This just creates parallel ways to a highway. It is recommended to check the geometry of the highway before using this tool.

// Count and length of all sidewalks touched in Mesa County by vorpalblade after April 1 2024
[out:json][timeout:25];
{{geocodeArea:"Mesa County, Colorado, United States"}}->.searchArea;
way["highway"="footway"](newer:"2024-04-01T00:00:00Z")(user_touched:vorpalblade)(area.searchArea);
make stat number=count(ways),length=sum(length());
out;

Explanation:

• [out:json][timeout:25]: Set the output to json, timeout after 25 seconds
• {{geocodeArea:"Mesa County, Colorado, United States"}}->.searchArea;: Set the search area to Mesa County, Colorado
• way["highway"="footway"]: Find footways
  • (newer:"2024-04-01T00:00:00Z"): Filter footways that were touched after April 01, 2024
  • (user_touched:vorpalblade): Filter footways that were touched by the user vorpalblade
  • (area.searchArea): Filter footways to only be inside the search area
• make stat number=count(ways),length=sum(length());: Output a count of the ways (count(ways)) and the sum of the length of those ways (sum(length()))
• out: Output the json

Sample Query (you'll have to hit show data)

GPLv2 or any later version