signal_detector.schema.json

{
    "primaryKey": "detector_id",
    "missingValues": [
        "NaN",
        ""
    ],
    "fieldsMatch": "subset",
    "foreignKeys": [
        {
            "fields": "controller_id",
            "reference": {
                "resource": "signal_controller",
                "fields": "controller_id"
            }
        },
        {
            "fields": "link_id",
            "reference": {
                "resource": "link",
                "fields": "link_id"
            }
        },
        {
            "fields": "ref_node_id",
            "reference": {
                "resource": "node",
                "fields": "node_id"
            }
        }
    ],
    "fields": [
        {
            "name": "detector_id",
            "type": "any",
            "description": "Primary key.",
            "constraints": {
                "required": true
            }
        },
        {
            "name": "controller_id",
            "type": "any",
            "description": "Required. Foreign key to signal_controller table.",
            "constraints": {
                "required": true
            }
        },
        {
            "name": "signal_phase_num",
            "type": "integer",
            "description": "Required. Number of the associated phase.",
            "constraints": {
                "required": true
            }
        },
        {
            "name": "link_id",
            "type": "any",
            "description": "Foreign key. The link covered by the detector.",
            "constraints": {
                "required": true
            }
        },
        {
            "name": "start_lane",
            "type": "integer",
            "description": "Left-most lane covered by the detector.",
            "constraints": {
                "required": true
            }
        },
        {
            "name": "end_lane",
            "type": "integer",
            "description": "Right-most lane covered by the detector (blank if only one lane)."
        },
        {
            "name": "ref_node_id",
            "type": "any",
            "description": "The detector is on the approach to this node.",
            "constraints": {
                "required": true
            }
        },
        {
            "name": "det_zone_lr",
            "type": "number",
            "description": "Required. Distance from from the stop bar to detector in short_length units.",
            "constraints": {
                "required": true
            }
        },
        {
            "name": "det_zone_front",
            "type": "number",
            "description": "Optional. Linear reference of front of detection zone in short_length units."
        },
        {
            "name": "det_zone_back",
            "type": "number",
            "description": "Optional. Linear reference of back of detection zone in short_length units."
        },
        {
            "name": "det_type",
            "type": "string",
            "description": "Optional. Type of detector."
        }
    ],
    "name": "signal_detector.schema.json",
    "description": "A signal detector is associated with a controller, a phase and a group of lanes.",
    "$schema": "https://datapackage.org/profiles/2.0/tableschema.json"
}