96th Street and Allisonville Road Intersection Reconstruction
American Structurepoint performed construction inspection services for the improvements to the intersection of 96th Street and Allisonville Road that included complete reconstruction of the existing intersection as well as modifications to the traffic flow through the intersection. The traffic flow modifications included a conversion of the existing signalized intersection by installing Median U-turns (also known as “Michigan-lefts”) downstream from each leg of the intersection.
The modification to the intersection included removal of the existing left-turn lanes located at each leg of the intersection. Once removed, each leg allows for through traffic and right-turn traffic only. Left turns for each leg are then made via median u-turns downstream of the intersection. The existing intersection and approaches were completely reconstructed by using full-depth QC/QA Portland Cement Concrete Pavement (PCCP) of varying thicknesses. New storm sewers were constructed utilizing four stormwater BMP structures prior to out-letting. New detention structures will be constructed as well.
Additional elements of the project included the construction of a multi-use pathway, retaining wall construction (cast-in-place, MSE, and modular block), bike lane installation, new lighting, signs, and pavement markings. Elements of the pedestrian pathways will include colored and stamped concrete as well as the use of pedestrian handrails. This project also included a complex landscaping plan with significant tree mitigation.
Maintenance of traffic was accomplished via phased construction. 16 phases were used in order to build the project while keeping as much traffic flowing through the intersection as possible.
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