Texas Department of Transportation (TxDOT) Precertification Categories
| 1.3.1 | SUBAREA/CORRIDOR PLANNING |
| 1.4.1 | LAND PLANNING/ENGINEERING |
| 1.5.1 | FEASIBILITY STUDIES |
| 3.1.1 | ROUTE STUDIES & SCHEMATIC DESIGN - MINOR ROADWAYS |
| 3.2.1 | ROUTE STUDIES & SCHEMATIC DESIGN - MAJOR ROADWAYS |
| 3.3.1 | ROUTE STUDIES & SCHEMATIC DESIGN - COMPLEX HIGHWAYS |
| 3.4.1 | MINOR BRIDGE LAYOUTS |
| 3.5.1 | MAJOR BRIDGE LAYOUTS |
| 3.6.1 | MULTI-LEVEL INTERCHANGE AND EXOTIC BRIDGE LAYOUT |
| 4.1.1 | MINOR ROADWAY DESIGN |
| 4.2.1 | MAJOR ROADWAY DESIGN |
| 4.3.1 | COMPLEX HIGHWAY DESIGN |
| 4.4.1 | MAJOR FREEWAY INTERCHANGES AND DIRECT CONNECTORS |
| 5.1.1 | MINOR BRIDGE DESIGN |
| 5.2.1 | MAJOR BRIDGE DESIGN |
| 5.3.1 | MULTI-LEVEL INTERCHANGE DESIGN |
| 5.4.1 | EXOTIC BRIDGE DESIGN |
| 6.1.1 | ROUTINE BRIDGE INSPECTION |
| 7.1.1 | TRAFFIC ENGINEERING STUDIES |
| 7.2.1 | HIGHWAY-RAIL GRADE CROSSING STUDIES |
| 7.3.1 | TRAFFIC SIGNAL TIMING |
| 7.4.1 | TRAFFIC CONTROL SYSTEMS ANALYSIS, DESIGN AND IMPLEMENTATION |
| 7.5.1 | INTELLIGENT TRANSPORTATION SYSTEMS |
| 8.1.1 | SIGNING, PAVEMENT MARKING AND CHANNELIZATION |
| 8.2.1 | ILLUMINATION |
| 8.3.1 | SIGNALIZATION |
| 8.4.1 | ITS CONTROL SYSTEMS ANALYSIS, DESIGN & IMPLEMENTATION |
| 8.5.1 | HIGHWAY-RAIL GRADE CROSSINGS |
| 9.1.1 | BICYCLE AND PEDESTRIAN FACILITY DEVELOPMENT |
| 10.1.1 | HYDROLOGIC STUDIES |
| 10.2.1 | BASIC HYDRAULIC DESIGN |
| 10.3.1 | COMPLEX HYDRAULIC DESIGN |
| 10.4.1 | PUMP STATION-HYDRAULICS |
| 10.4.3 | PUMP STATION-STRUCTURES |
| 10.5.1 | BRIDGE SCOUR EVALUATIONS AND ANALYSIS |
| 11.1.1 | ROADWAY CONSTRUCTION MANAGEMENT AND INSPECTION |