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segment_lane

segment_lane

  • description Defines added and dropped lanes, and changes to lane parameters. If a lane is added, it has no parent. If it is changed or dropped, the parent_lane_id field keys to the associated lane on the lane table.
  • path segment_lane.csv
  • schema
    • missingValues ['NaN', '']
    • primaryKey ['segment_lane_id']
    • foreignKeys
    • [1]
      • fields ['segment_id']
      • reference
      • resource segment
      • fields ['segment_id']
    • fieldsMatch ['subset']
name type description constraints categories
segment_lane_id any Primary key. {'required': True}
segment_id any Required. Foreign key to the associated segment. {'required': True}
lane_num integer Required. -1, 1, 2 (use left-to-right numbering). 0 signifies a lane that is dropped on the segment. {'required': True, 'minimum': -10, 'maximum': 10}
parent_lane_id any Optional. If a lane drops or changes characteristics on the segment, the lane_id for that lane.
allowed_uses string Optional. Set of allowed uses that should appear in either the use_definition or use_group tables; comma-separated.
r_barrier string Optional. Whether a barrier exists to prevent vehicles from changing lanes to the right. [{'value': 'none', 'label': 'a vehicle can change lanes, provided that the vehicle-type is permitted in the destination lane'}, {'value': 'regulatory', 'label': 'a regulatory prohibition (e.g., a double-white solid line) against changing lanes, but no physical barrier'}, {'value': 'physical', 'label': 'a physical barrier (e.g., a bollard, curb, Jersey barrier) is in place'}]
l_barrier string Optional. Whether a barrier exists to prevent vehicles from changing lanes to the left [{'value': 'none', 'label': 'a vehicle can change lanes, provided that the vehicle-type is permitted in the destination lane'}, {'value': 'regulatory', 'label': 'a regulatory prohibition (e.g., a double-white solid line) against changing lanes, but no physical barrier'}, {'value': 'physical', 'label': 'a physical barrier (e.g., a bollard, curb, Jersey barrier) is in place'}]
width number Optional. Width of the lane (short_length units) {'minimum': 0}