R29
Lane Arrangement numbers zero or one Driving Lane
Driving Lane is numbered according to its one or many Lane Arrangement
If a Lane Arrangement partitions a Driving Lane, not a Dedicated Bike Lane for example, it is used to number its Lane using the California lane numbering system.
As a Driving Lane progresses through its Conduit, it will span one or more Lane Configuration Segments. Each such span yields a distinct Lane Arrangement and a potentially different California style lane number.
Within a Lane Configuration Segment, no Driving Lanes are reconfigured. If any Merge, Fork or other reconfiguration is initiated, a new Lane Configuration Segment begins and all the lanes are renumbered (not the Lane Divisions, but the Driving Lanes themselves according to the California numbering scheme). Here is an example:
Lane reconfiguration and Driving Lane numbering are relevant only to Driving Lanes, so a Lane Configuration Segment is defined only when there is at least one Driving Lane present in the Road Segment. By contrast, a Shared Single Road Lane, has no Driving Lane and, hence no lane reconfiguration.
Every Driving Lane longitudinally spans at least one Lane Configuration Segment. This is because every Driving Lane is initiated at some point and Driving Lane Initiation is defined in the Lane Reconfiguration Subsystem as some type of lane reconfiguration.
Note that Center Turn Lanes are not considered when defining Lane Configuration Segments. A Center Turn Lane runs between the opposing Conduits of a Road Segment and is subject to lane initiation and termination. Furthermore, Center Turn Lanes are not numbered using the 1, 2, 3 lane numbering system.
Driving Lane Order.(Inside division, Outside division, Road segment) ->
Driving Lane.(Inside division, Outside division, Road segment)
Driving Lane Order.(Inside division, LCS, Conduit, Road segment) ->
Lane Arrangement.(Inside division, LCS, Conduit, Road segment)
Driving Lane Order.(Outside division, LCS, Road segment) ->
Lane Arrangement.(Outside division, LCS, Road segment)