Abstract: Guardrails are critical boundary infrastructures protecting against road departures and traffic collisions. The presence and condition information of in-service guardrails are essential for transportation agencies to perform ...

Abstract: A sound barrier, also called a noise barrier, plays an irreplaceable role in traffic noise abatement. The Federal Highway Administration’s (FHWA) highway noise regulation requires each state highway agency to maintain a ...

Abstract: Pavement markings are a key transportation asset and traffic control device that facilitate safe and predictable driving. The effectiveness of pavement markings is dependent on their condition, particularly during nighttime ...