Evaluation of North Dakota's fixed automated spray technology systems

The North Dakota Department of Transportation (NDDOT) has installed two fixed automated spray technology (FAST) systems. One system is installed at the Interstate 29 (I-29) Buxton Bridge (near Buxton, ND), while the second installation is at the Interstate 94 (I-94) Red River Bridge between Fargo, ND, and Moorhead, MN. This study evaluates the two existing FAST systems to assist in determining if additional systems are feasible. This study has three main objectives: 1) describe how the FAST systems work; 2) document how the current NDDOT FAST systems perform related to treating the bridge decks, and 3) analyze the benefits and costs of the systems.