They wanted something that was economical and low-maintenance. But more importantly, they wanted a type of bridge that could be erected quickly with as little disruption to traffic as possible. Scheduling problems associated with manufacturing, delivery and fabrication are eliminated. Quality control can be handled locally. They are more aesthetically pleasing than steel girder bridges.
Maintenance is comparable to the steel girder.
More New Mexico labor will be used than with the steel option. New Mexico doesn't have any local steel-fabricating shops capable of producing steel girders for bridges. The precast segments, weighing about 80 tons each, will be poured at a construction site northwest of the interchange. Casting began earlier this month. Segments will be stored at the construction site until they are ready to be hauled and dropped into place.