segment.schema.json

{
    "primaryKey": "segment_id",
    "missingValues": [
        "NaN",
        ""
    ],
    "fieldsMatch": "subset",
    "foreignKeys": [
        {
            "fields": "link_id",
            "reference": {
                "resource": "link",
                "fields": "link_id"
            }
        },
        {
            "fields": "ref_node_id",
            "reference": {
                "resource": "node",
                "fields": "node_id"
            }
        }
    ],
    "fields": [
        {
            "name": "segment_id",
            "type": "any",
            "description": "Primary key.",
            "constraints": {
                "required": true
            }
        },
        {
            "name": "link_id",
            "type": "any",
            "description": "Required. Foreign key to road_links. The link that the segment is located on.",
            "constraints": {
                "required": true
            }
        },
        {
            "name": "ref_node_id",
            "type": "any",
            "description": "Required. Foreign key to node where distance is 0.",
            "constraints": {
                "required": true
            }
        },
        {
            "name": "start_lr",
            "type": "number",
            "description": "Required. Distance from `ref_node_id` in short_length units.",
            "constraints": {
                "required": true,
                "minimum": 0
            }
        },
        {
            "name": "end_lr",
            "type": "number",
            "description": "Required. Distance from `ref_node_id`in short_length units.",
            "constraints": {
                "required": true,
                "minimum": 0
            }
        },
        {
            "name": "grade",
            "type": "number",
            "description": "% grade, negative is downhill",
            "constraints": {
                "maximum": 100,
                "minimum": -100
            },
            "warnings": {
                "maximum": 25,
                "minimum": -25
            }
        },
        {
            "name": "capacity",
            "type": "number",
            "description": "Optional. Saturation capacity (pce/hr/ln)",
            "constraints": {
                "minimum": 0
            }
        },
        {
            "name": "free_speed",
            "type": "number",
            "description": "Optional. Free flow speed, units defined by config file",
            "constraints": {
                "minimum": 0,
                "maximum": 200
            },
            "warnings": {
                "minimum": 1,
                "maximum": 120
            }
        },
        {
            "name": "lanes",
            "type": "integer",
            "description": "Optional. Number of lanes in the direction of travel (must be consistent with link lanes + lanes added)."
        },
        {
            "name": "l_lanes_added",
            "type": "integer",
            "description": "Optional. # of lanes added on the left of the road link (negative indicates a lane drop)."
        },
        {
            "name": "r_lanes_added",
            "type": "integer",
            "description": "Optional. # of lanes added on the right of the road link (negative indicates a lane drop)."
        },
        {
            "name": "bike_facility",
            "type": "string",
            "description": "Optional. Types of bicycle accommodation based on the National Bikeway Network Data Template (Table 1-A) See https://data.transportation.gov/stories/s/National-Bicycle-Network/88zh-3rqb/",
            "categories": [
                "unseparated bike lane",
                "buffered bike lane",
                "separated bike lane",
                "counter-flow bike lane",
                "paved shoulder",
                "shared lane",
                "shared use path",
                "off-road unpaved trail",
                "other",
                "none"
            ]
        },
        {
            "name": "ped_facility",
            "type": "string",
            "description": "Optional. Type of pedestrian accommodation:unknown,none,shoulder,sidewalk,offstreet_path.",
            "categories": [
                "unknown",
                "none",
                "shoulder",
                "sidewalk",
                "offstreet_path"
            ]
        },
        {
            "name": "parking",
            "type": "string",
            "description": "Optional. Type of parking: unknown,none,shoulder,sidewalk,offstreet_path.",
            "categories": [
                "unknown",
                "none",
                "shoulder",
                "sidewalk",
                "offstreet_path"
            ]
        },
        {
            "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": "toll",
            "type": "number",
            "description": "Optional.  Toll on the segment, in currency units."
        },
        {
            "name": "jurisdiction",
            "type": "string",
            "description": "Optional. Optional.  Owner/operator of the segment."
        },
        {
            "name": "row_width",
            "type": "number",
            "description": "Optional. Width (short_length units) of the entire right-of-way (both directions).",
            "constraints": {
                "minimum": 0
            },
            "warnings": {
                "minimum": 10
            }
        }
    ],
    "name": "segment.schema.json",
    "description": "A portion of a link defined by `link_id`,`ref_node_id`, `start_lr`, and `end_lr`. Values in the segment will override they value specified in the link table. When one segment is fully contained within another, its value prevails.",
    "$schema": "https://datapackage.org/profiles/2.0/tableschema.json"
}