lane.schema.json

{
    "primaryKey": "lane_id",
    "missingValues": [
        "NaN",
        ""
    ],
    "fieldsMatch": "subset",
    "foreignKeys": [
        {
            "fields": "link_id",
            "reference": {
                "resource": "link",
                "fields": "link_id"
            }
        }
    ],
    "fields": [
        {
            "name": "lane_id",
            "type": "any",
            "description": "Primary key",
            "constraints": {
                "required": true
            }
        },
        {
            "name": "link_id",
            "type": "any",
            "description": "Required. Foreign key to link table.",
            "constraints": {
                "required": true
            }
        },
        {
            "name": "lane_num",
            "type": "integer",
            "description": "Required. e.g., -1, 1, 2 (use left-to-right numbering). By convention, the left-most through lane is 1. Left-turn lanes have negative numbers",
            "constraints": {
                "required": true,
                "minimum": -10,
                "maximum": 10
            }
        },
        {
            "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.<br>- `none` (the default). Indicates that a vehicle can change lanes, provided that the vehicle-type is permitted in the destination lane<br>- `regulatory`. There is a regulatory prohibition (e.g., a double-white solid line) against changing lanes, but no physical barrier<br>- `physical`. A physical barrier (e.g., a curb, Jersey barrier) is in place.",
            "categories": [
                "none",
                "regulatory",
                "physical"
            ]
        },
        {
            "name": "l_barrier",
            "type": "string",
            "description": "Optional. Whether a barrier exists to prevent vehicles from changing lanes to the right.<br>- `none` (the default). Indicates that a vehicle can change lanes, provided that the vehicle-type is permitted in the destination lane<br>- `regulatory`. There is a regulatory prohibition (e.g., a double-white solid line) against changing lanes, but no physical barrier<br>- `physical`. A physical barrier (e.g., a curb, Jersey barrier) is in place.",
            "categories": [
                "none",
                "regulatory",
                "physical"
            ]
        },
        {
            "name": "width",
            "type": "number",
            "description": "Optional. Width of the lane, short_length units.",
            "constraints": {
                "minimum": 0
            }
        }
    ],
    "name": "lane.schema.json",
    "description": "The lane file allocates portions of the physical right-of-way that might be used for travel. It might be a travel lane, bike lane, or a parking lane. Lanes only are included in directed links; undirected links are assumed to have no lane controls or directionality. If a lane is added, dropped, or changes properties along the link, those changes are recorded on the `segment_link` table. Lanes are numbered sequentially, starting at either the centerline (two-way street) or the left shoulder (one-way street or divided highway with two centerlines).",
    "$schema": "https://datapackage.org/profiles/2.0/tableschema.json"
}