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In recent years there has been a significant increase of the interest in additive manufacturing (AM; also frequently referred to as 3D printing), yet AM is largely unexplored within infrastructure projects. By harnessing the new capabilities of AM, researchers have managed to access unprecedented new design capabilities and operational flexibility (e.g., on-demand, tool-free production). This […]
There are two types of PT tendons—bonded or unbonded—depending on the timing of installing the duct, tensioning the strands, and filling the ductwith grout. Injected filler materials afford additional corrosion protection by providing physical barriers to water and air, i.e., oxygen and carbon dioxide.Cementitious grout can also be beneficial, providing a high-pH environment to form […]
ALDOT continues to make steady progress on the new Intracoastal Waterway Bridge in Gulf Shores, a $52 million project designed to ease traffic congestion and improve safety in the area. Alongside the bridge, a $30 million connector project to tie into SR-161, formerly designated as the Foley Beach Express, is also underway. Both projects are […]
This document takes an expansive view and considers how pavement and bridge conditions can contribute to system performance areas, such as highway safety, freight mobility, or reliability. The document also considers other impacts, such as how attributes such as pavement shoulders, pavement friction, or bridge conditions contribute to highway safety, freight movement, noise reduction, and […]
There are over 590,000 bridges dispersed across the roadway network that stretches across the United States alone. Each bridge with a length of 20 feet or greater must be inspected at least once every 24 months, according to the Federal Highway Act (FHWA) of 1968. This research developed an artificial intelligence (AI)-based framework for bridge […]
Federal aid to disaster-damaged highways and bridges has been available since the 1930s. The U.S. Department of Transportation provides federal assistance for disaster-damaged federal-aid highways through the Emergency Relief (ER) Program administered by the Federal Highway Administration (FHWA). The program is funded by a permanent annual authorization of $100 million from the Highway Trust Fund […]