Assessing the Completeness of Bicycle Trail and Lane Features in O pen S treet M ap for the U nited S tates

This article assesses the completeness of bicycle trail and on‐street lane features in O pen S treet M ap ( OSM ). Comparing OSM cycling features with reference data from local planning agencies for selected US Urbanized Areas shows that OSM bicycle trails tend to be more completely mapped than bicycle lanes. Manual evaluation of mapped cycling features in OSM and G oogle M aps for selected test areas within the Central Business Districts of P ortland ( OR ) and M iami ( FL ) through comparison with governmental datasets, satellite imagery, and G oogle Street View, shows that the Bicycle layer in G oogle M aps can help to identify some missing or erroneously mapped OSM cycling links. However, G oogle M aps was also found to have some gaps in its data layers, suggesting that consultation of current trail and lane data from local planning authorities, if available, should be considered as an additional data source for bicycle related planning projects.