Route calculation for car do not take the best exit

Open Source Routing Engine
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https://graphhopper.com/maps/?point=51.00548%2C3.75558&point=51.0065%2C3.75131&locale=nl&elevation=true&profile=car&use_miles=false&selected_detail=Elevation&layer=OpenStreetMap

What can be the cause some tag missing in osm ?

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You mean it should rather be this?

image

The roundabout is tagged as highway=secondary and the shortcuts as highway=secondary_link, so this seems right, but yes GraphHopper should yield the shorter (and most likely faster) route here. Currently it does not because the default car profile assumes secondary roads are faster than secondary_links.

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