He [OSM founder Steve Coast] admitted that OSM falls short in two areas: navigation information like one-way streets and restricted turns, and geo-coded address data. To fix the navigation data issue, a team of about 25 people at Telenav has been looking at the GPS traces the company received from Scout users over the last three years and analyzed it. This has helped the company to determine what the likely speed limits in many areas are, for example, and if all cars just travel in a single direction on a given street or just make right turns, chances are this is indeed a one-way street or a restricted turn. (http://techcrunch.com/2014/05/19/telenav-takes-on-google-with-new-openstreetmap-based-offline-navigation-sdk/)
Figure: OpenTripPlanner's Graph Visualizer (in debugger with option
TransitShed, also developed by Brandon Martin-Anderson. Announced on Transit Developer - Google Groups Currently unaccessible.
Figure: TransitShed Snapshot