Anchorage Alaska

MTJ Engineering reviewed the Dowling Road Roundabout design at the request of Lounsbury and Associates, and Buckhurst Fish and Jacquemart. MTJ’s review included an evaluation of the expected safety, capacity, and operation of the existing design. Based on the findings of this review, the geometric design was revised to remove substandard elements, and to improve safety, capacity, and operation. Changes were in accordance with the recommendations of the FHWA "Roundabouts: An Informational Guide." Geometric changes were limited to the essential minimum, and were constrained to the original utility and ROW constraints to avoid significant cost increases. The revised design was based on the same design-year traffic volumes as the original design. 

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