Both the Road Centerline Model and Lane Model represent the same real world road network. The following figures show how the same road segments are represented as Links and Nodes (Road Centerline Model), and as Lane Groups and Lane Group Connectors (Lane Model):
We logically "glue" the two models together, in both directions. Each Lane Group Connector (Lane Model) has a position on a Link in the Road Centerline Model. And every portion of a Lane Group is associated with a Link in the Road Centerline Model.
Lane Group References on Road Centerline Model Links
Similarly, we map Road Centerline Model Link IDs onto Lane Group Reference Geometry.
Lane Groups may fit within one Link, or span multiple Links. A Link is assigned to a Lane Group as a parametric range (from 0 to 1). The entire Lane Group must have some Link associated for all of its length, with no gaps or overlaps.
The following example is the same topology as above, but with the Links colored distinctly for clarity:
We project the Links onto the Lane Groups to determine the associations: