Lane
A lane is a path within a Conduit where a traffic policy applies. The policy may specify the direction of traffic, the type or purpose of traffic (bikes, taxis, cars) or possibly no allowed traffic at all. If traffic is allowed, it may flow in only one direction as determined by the surrounding Conduit.
Not all Lanes are drivable. Sometimes Lane Divisions will open up into a Y shape to accommodate a set of diagonal stripes or a barrier or a temporary median of some type. This region is considered to be a Lane because of its shape and boundaries.
The space between two tightly adjacent stripes close enough together to be interpreted as a complete Lane Division will not be construed as a Lane. A double yellow line indicating the separation of traffic flow in the USA is one such example. Two closely adjacent, but distinct Lane Divisions will, however, define a Lane even when there may be inadequate width for a vehicle to travel within it.
Note that this imposes a requirement on underlying perception and symbology to properly classify Lane Divisions.
- Inside division + Outside division + Road segment
The average distance between the inside and outside Lane Divisions from the front of the Ego Vehicle up to some prescribed distance (which may vary with Ego Vehicle speed) ahead of the Ego Vehicle.
Comment: Presumably we’ll have appropriate attributes/formulas for computing this distance incorporated into this model. But they have not been modeled yet
Type: Distance