{
 "_doc": "TxDOT standard-specification item number -> MasterFormat level-2 group (the classifier's 171 classes). Labels for eval/line_items_txdot.tsv come from this table, not from per-item judgement. Only items whose TxDOT title maps to one group without doubt are listed; left out on purpose: repair/maintenance items that could equally sit in a maintenance group (351, 354, 361, 438, 446, 677, 678, 7xx maintenance specs), temporary work-zone items (512, 662), signs and signals (636, 644, 680: MasterFormat 34 40 00 is not one of the 171 classes), 400 (mixes structure excavation with cut-and-restore paving), and every 4-digit special specification (title unknown). Built 2026-10-11; review before relying on it.",
 "items": {
  "100": ["Preparing Right of Way", "31 10 00"],
  "104": ["Removing Concrete", "02 40 00"],
  "105": ["Removing Stabilized Base and Asphalt Pavement", "02 40 00"],
  "110": ["Excavation", "31 20 00"],
  "132": ["Embankment", "31 20 00"],
  "164": ["Seeding for Erosion Control", "32 90 00"],
  "247": ["Flexible Base", "32 10 00"],
  "260": ["Lime Treatment (Road-Mixed)", "31 30 00"],
  "275": ["Cement Treatment (Road-Mixed)", "31 30 00"],
  "316": ["Seal Coat", "32 10 00"],
  "360": ["Concrete Pavement", "32 10 00"],
  "416": ["Drilled Shaft Foundations", "31 60 00"],
  "420": ["Concrete Substructures", "03 30 00"],
  "422": ["Concrete Superstructures", "03 30 00"],
  "425": ["Precast Prestressed Concrete Structural Members", "03 40 00"],
  "429": ["Concrete Structure Repair", "03 00 00"],
  "432": ["Riprap", "31 30 00"],
  "462": ["Concrete Box Culverts and Storm Drains", "33 40 00"],
  "464": ["Reinforced Concrete Pipe", "33 40 00"],
  "465": ["Junction Boxes, Manholes, and Inlets", "33 40 00"],
  "466": ["Headwalls and Wingwalls", "33 40 00"],
  "496": ["Removing Structures", "02 40 00"],
  "500": ["Mobilization", "01 70 00"],
  "502": ["Barricades, Signs, and Traffic Handling", "01 50 00"],
  "506": ["Temporary Erosion, Sedimentation, and Environmental Controls", "31 20 00"],
  "529": ["Concrete Curb, Gutter, and Combined Curb and Gutter", "32 10 00"],
  "530": ["Intersections, Driveways, and Turnouts", "32 10 00"],
  "531": ["Sidewalks", "32 10 00"],
  "540": ["Metal Beam Guard Fence", "34 70 00"],
  "544": ["Guardrail End Treatments", "34 70 00"],
  "545": ["Crash Cushion Attenuators", "34 70 00"],
  "550": ["Chain Link Fence", "32 30 00"],
  "610": ["Roadway Illumination Assemblies", "26 50 00"],
  "618": ["Conduit", "26 00 00"],
  "620": ["Electrical Conductors", "26 00 00"],
  "624": ["Ground Boxes", "26 00 00"],
  "658": ["Delineator and Object Marker Assemblies", "34 70 00"],
  "666": ["Retroreflectorized Pavement Markings", "32 10 00"],
  "668": ["Prefabricated Pavement Markings", "32 10 00"],
  "672": ["Raised Pavement Markers", "32 10 00"],
  "752": ["Tree and Brush Removal", "31 10 00"]
 }
}