There are no way to tag this. But OSRM has a penalty for doing u-turn. Do you have a link to a concrete situation?
See https://github.com/DennisOSRM/Project-OSRM/issues/65 for a discussion on the issue of u-turns across road dividers. Med venlig hilsen Emil Tin IT- og Processpecialist Trafikdesign ________________________________ KØBENHAVNS KOMMUNE Teknik- og Miljøforvaltningen Center for Trafik Islands Brygge 37 Vær. 118 Postboks 450 2300 København S Mobil +45 2369 5986 Email z...@tmf.kk.dk<mailto:%20z...@tmf.kk.dk> EAN 5798009493149 Fra: Marat [mailto:mar...@gmail.com] Sendt: 17. april 2013 08:21 Til: osrm-talk@openstreetmap.org Emne: [OSRM-talk] road double continuous line Hi! I'm not sure if this is common rule around the world, but I think that in most countries it is restricted to make a turn crossing double continuous line. Is there a way to to tag highways so that OSRM would not make routing crossing this line? It is frustrating to make restriction to turn left on each junction of such road. Especially there are no special signs, and double line is the only restriction. Thank you!
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