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The new design includes a mini roundabout at Gedney Road, as well as standard roundabouts at Darrah Lane and Irwin Place. These roundabouts, coupled with bump outs at Gainsboro Road and Texas Ave are expected to calm the traffic.
The roundabout design proposed to replace the current traffic signal at the intersection of Gedney Road, Texas Avenue, and Princeton Pike was modeled using a series of design software’s as well as roadway design standards. After modeling the design using Synchro and AutoCAD, with actual traffic data obtained from site visit observations as well as accounting for industry design standards. An example of one of the new intersections is below:
The new bridge design was developed in HEC-RAS by optimizing the area of flow beneath the bridge to alleviate overtopping, while considering realistic constraints such as roadway line of site and encroachment onto private property. The design standard used was to lower the energy grade line beneath the top chord of the bridge.
The new bridge was designed to have a 65 ft span length. The top chord of the bridge will be at an elevation of 15.1 ft, an increase in 3 ft. The bottom chord will be at an elevation of 12.1 ft. The channel width will be expanded 7.5 ft on each side to coincide with the new span length. The left and right banks will be expanded by 10 ft in either direction and will now be located at station 200 and 239, respectively
For two days, February 16th and and February 19th, the team went to the field to help Jack survey the creek to obtain the ground bottom elevation for HecRas input.