R19

R19 / Generalization

Lane is a Unidirectional or Bidirectional Lane

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A Lane either constrains traffic to legally flow in one direction or it allows traffic to move in either direction. Bidirectional traffic is permitted when a Road consists of only one Shared Road Lane or when a Shared Turn Lane is sandwiched between the Conduits in a Two Way Road Segment.

Formalization

<subclass>.(Inside division, Outside division, Road segment) ->
    Lane.(Inside division, Outside division, Road segment)