segment_lane.schema.json

{
    "primaryKey": "segment_lane_id",
    "missingValues": [
        "NaN",
        ""
    ],
    "fieldsMatch": "subset",
    "foreignKeys": [
        {
            "fields": "segment_id",
            "reference": {
                "resource": "segment",
                "fields": "segment_id"
            }
        }
    ],
    "fields": [
        {
            "name": "segment_lane_id",
            "type": "any",
            "description": "Primary key.",
            "constraints": {
                "required": true
            }
        },
        {
            "name": "segment_id",
            "type": "any",
            "description": "Required. Foreign key to the associated segment.",
            "constraints": {
                "required": true
            }
        },
        {
            "name": "lane_num",
            "type": "integer",
            "description": "Required. -1, 1, 2 (use left-to-right numbering). 0 signifies a lane that is dropped on the segment.",
            "constraints": {
                "required": true,
                "minimum": -10,
                "maximum": 10
            }
        },
        {
            "name": "parent_lane_id",
            "type": "any",
            "description": "Optional. If a lane drops or changes characteristics on the segment, the lane_id for that lane."
        },
        {
            "name": "allowed_uses",
            "type": "string",
            "description": "Optional. Set of allowed uses that should appear in either the use_definition or use_group tables; comma-separated."
        },
        {
            "name": "r_barrier",
            "type": "string",
            "description": "Optional. Whether a barrier exists to prevent vehicles from changing lanes to the right (default is none)",
            "categories": [
                "none",
                "regulatory",
                "physical"
            ]
        },
        {
            "name": "l_barrier",
            "type": "string",
            "description": "Optional. Whether a barrier exists to prevent vehicles from changing lanes to the left (default is none)",
            "categories": [
                "none",
                "regulatory",
                "physical"
            ]
        },
        {
            "name": "width",
            "type": "number",
            "description": "Optional. Width of the lane (short_length units)",
            "constraints": {
                "minimum": 0
            }
        }
    ],
    "name": "segment_lane.schema.json",
    "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.",
    "$schema": "https://datapackage.org/profiles/2.0/tableschema.json"
}