I’ve been re-riding my city by bicycle this year. My goal was to visit more of the roads I typically ignore. My progress has been much faster than I expected due to extended cold weather keeping me in the city instead of riding out on the highway.

JOSM is great at displaying multiple GPS traces at once. I even managed to load up all 1,400 of mine though it took some time.

I saved a local copy of the road network in an .osm file and have been crossing off roads in JOSM as I visit them. I’ve come across a few unmapped roads and paths on my journeys while doing this. The first time I rode the city back in 2014 I found hundreds of unmapped service roads.

Using the pruned road network file I use mkgmap to create a map overlay for my Garmin that shows me roads I haven’t covered yet this year which I update after each ride. I also have a second overlay that shows me roads I’ve never been down of which there are about 25 km, mostly high speed roads with no shoulder.

Picture represents about 3,500 km of riding for the year so far.