APPLICATIONS OF ROBOTICS AND OTHER AUTOMATED TECHNIQUES TO THE CONSTRUCTION, MAINTENANCE, AND INSPECTION OF HIGHWAY SYSTEMS. FINAL REPORT

Many tasks in the construction, maintenance, and inspection of highway systems are dangerous, repetitive, and labor intensive. Mitigation of hazards to human workers, while performing this type of work, is expensive and inefficient. In cases such as these, application of robotics technologies has the potential for improving some of the Department's operations. Advanced robotics technologies exist in other disciplines such as manufacturing, defense, energy, and space-related industries. These technologies, however, are not extensively applied to highway-related construction, maintenance, and inspection tasks. The objective of this study was to begin a systematic, cooperative effort to apply advanced robotics technologies to highway-related problems. An implementation model was developed which provides a systematic process leading to implementation. The study was limited to a list of seven potential problem areas selected by TxDOT management: flagging for traffic control, culvert clean-out and inspection, drilled shaft inspection, placement and retrieval of traffic cones, non-destructive testing of roadway density during construction, underwater inspection for scour and deterioration, and traffic signal and illumination bulb replacement. The study included field visits, interviews, telephone interviews with officials from the other 49 states, and literature review. Sandia National Laboratories' Robotic Vehicle Range contributed to the technology assessment portion of this study.