Turn restrictions, exit and destinations are important components of navigation system and enhance the routing and guidance accuracy of any routing engine. To improve OpenStreetMap, broaden its reach globally and make it more accurate for routing, we would like to join hands with the community to map missing turn restrictions, exit and destinations in Europe using Mapillary as the primary source.

Timeline

First stop is Germany, we want to concentrate on three major cities: Berlin, Stuttgart, Wolfsburg and map turn restrictions, exit and destinations, slowly branching out to other cities and countries in Europe.

Mapping workflow

Turn Restrictions

We have devised a simple way to add turn restrictions using the Mapillary and detected traffic signs using OSM navigation map that displays the detected turn restrictions from Mapillary, making it easy to know the position of the signage and to mark it as valid/invalid once it has been reviewed and mapped if required.

Marking a detected no left into a oneway as redundant restriction on the OSM navigation map

You can go through the detailed workflow: guide for mapping turn restrictions using Mapillary to know about the working procedure for mapping, tagging system and certain exceptional cases.

Motorway exit numbers & destinations:

Checkautopista2 by k1wi is a neat tool that highlights all the highways and their exits which makes it easier to add the missing exit and destination tags.

Here’s the detailed workflow for mapping exit & destinations using Tasking manager and Checkautopista2 with Mapillary as the primary source.

If you are a local mapper, please review the workflow and provide your suggestions on how it can be improved. When in doubt, notes will be added and local mappers contacted before updating an existing value.

Existing data

Current number of turn restrictions in 3 cities were extracted using overpass.

• Berlin: 1057
• Stuttgart: 828
• Wolfsburg: 72

Current number of exit & destination tags in 3 cities extracted from overpass.

Join in!

We have had tremendous support from the OpenStreetMap community so far, guiding us in every endeavor, suggesting us with new ideas and improvisations on how to make our workflows better, calling us out on occasional errors, answering our questions and clearing our doubts. We would love that collaboration and contribution to continue working together. Let’s all join in making OpenStreetMap the best!

From the data team at Mapbox