To calculate the “best” routes and more accurate arrival time estimates, #CoMaps assigns so-called penalties to pedestrian crossings or traffic calming features such as speed bumps.

For this to work, the data needs to be available and correct in #OpenStreetMap. On our blog, CoMaps contributor Jean-Baptiste shares some tips on how you can help with improving this data by finding tagging errors, all without having to do surveying in the field!