|
| 940 25 | CARGO TRANSPORT SERVICES, RAIL |
| 940 29 | CONSTRUCTION, ELEVATED TRANSIT STATION, INCLUDING REHABILITATION, MAINTENANCE AND REPAIR |
| 940 31 | CONSTRUCTION, RAIL STATION AND SHOP, INCLUDING REHABILITATION, MAINTENANCE AND REPAIR |
| 940 33 | CONSTRUCTION, SUBWAY AND SUBWAY STATION, INCLUDING REHABILITATION, MAINTENANCE AND REPAIR |
| 940 34 | CONSTRUCTION, TRANSIT FACILITY, OTHER, INCLUDING REHABILITATION, MAINTENANCE AND REPAIR) |
| 940 50 | PASSENGER TRANSPORTATION SERVICES, RAILROAD |
| 940 54 | POWER SUPPLY INSTALLATION, ELECTRIC |
| 940 55 | POWER SUPPLY, ELECTRIC, MAINTENANCE AND REPAIR |
| 940 61 | RAIL CAR MAINTENANCE AND REPAIR |
| 940 63 | RAIL GRINDING |
| 940 65 | RAILROAD CONSTRUCTION AT STREET INTERSECTION, INCLUDING MAINTENANCE AND REPAIR |
| 940 67 | RAILROAD SWITCHING AND TERMINAL SERVICES |
| 940 75 | SIGNAL SYSTEM INSTALLATION |
| 940 76 | SIGNAL SYSTEM MAINTENANCE AND REPAIR |
| 940 85 | TOWER CONSTRUCTION |
| 940 86 | TOWER MAINTENANCE AND REPAIR |
| 940 88 | TRACK CONSTRUCTION AND INSPECTION |
| 940 89 | TRACK MAINTENANCE AND REPAIR |
| 940 90 | TRAM CONSTRUCTION AND MAINTENANCE SERVICES |
| 940 92 | WEED AND BRUSH CONTROL SERVICES |