The city of Munich is currently gathering data on the streetspace with lane-level accuracy. Test data of this "Lane Model" is available for the northern part of the "Sonnenstrasse" in the center of Munich. This data is converted to CityGML and then visualized using the 3DCityDB Cesium Web-Map-Client.
Link: Northern part of the Sonnenstrasse in Munich (including roads, markings, vegetation, buildings and some city furniture)
Link: Bridge and Streetspace model including 3D traffic simulation visualization (including vegetation and traffic signs)