vissim2gmns.func_lib.create_lane_geometries

vissim2gmns.func_lib.create_lane_geometries(link_geometry: str | list | LineString, num_lanes: int, lane_width: float | list[float])[source]

Create lane centerline geometries from a link geometry.

Parameters:

  • link_geometry – A Shapely LineString or an iterable of (x, y) coordinate pairs.

  • num_lanes (int) – Number of lanes to generate.

  • lane_width (float | list[float]) – Lane width in meters. A single value is applied to every lane. A list must have the same length as num_lanes and is interpreted from rightmost lane to leftmost lane.

Notes

  • The lane geometries are generated by offsetting the link geometry.

    The leftmost index starts from 1, and the lane index increases from leftmost to rightmost lane (VISSIM Lane ordering).

Example

>>> from shapely.geometry import LineString
>>> link_geom = LineString([(0, 0), (100, 0)])
>>> lane_geoms = create_lane_geometries(link_geom, num_lanes=3, lane_width=3.5)
>>> for idx, lane_geom in lane_geoms.items():
...     print(f"Lane {idx}: {lane_geom}")
... Lane 1: LINESTRING (0 3.5, 100 3.5)
... Lane 2: LINESTRING (0 0, 100 0)
... Lane 3: LINESTRING (0 -3.5, 100 -3.5)
Returns:

Lane geometries ordered from rightmost to leftmost relative to the link direction.

Return type:

list[LineString]