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I'm new to OSM, and I'm creating a network dataset in ArcGIS pro using OSM data for Greater New Orleans. I'm wondering if OSM has any turn restriction data available already, or if I'd need to digitize and model turns manually :( If there is no data available through OSM and I do need to digitize/do everything manually, can anyone point me to any guide(s) related to best practices for restricting left turns and u-turns for city buses? Or any general rules of thumb |
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Turn restrictions are generally modelled in OSM as relations. This page is probably the best starting point for how they are stored. The scheme supports limiting the applicable modes of transport if required. Turn restrictions generally shouldn't be added to OSM explicitly when the turn is already prohibited by other data, e.g. when there a restriction on turning right to go backward up a oneway street. As for most things, OSM's level of completeness varies from place to place. I'm not familiar with your software for how to convert to something you'll find useful. If ArcGIS's native tools don't parse OSM turn restrictions by default, then you may be able to integrate with a routing engine that does and avoid reinventing the wheel. |
