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LKB provided comprehensive design Phases V & VI for highway and bridge design, survey and mapping, and a Safety & Operational Study for the reconstruction and improvement of 4.3 kilometers of the Cross Westchester Expressway, including the design of roadway lighting and preparation of MPT drawings.

The project required development of alternatives for mainline capacity improvements. Each was evaluated for traffic flow efficiency, construction costs, effects on local and intersecting roads, aesthetics, and impacts on local communities. LKB, working with NYSDOT Region 8 and our consulting partner firm, participated in public hearings and information centers, as part of a detailed public outreach program involving local governments, agencies, and community groups.

As part of the project, LKB performed the inspection and load rating of eight bridges and prepared design plans for three of the bridges included in the project. Notable project constraints included a New York City Aqueduct that passed under the roadway at a shallow depth. This required special load spanning techniques to carry new bridge footings for widened structures beyond the point where increased loading would influence the aqueduct roof slab. Also, the relocation of a high pressure gas main that crossed the travel lanes for the project’s entire length and overhead high tension lines which crossed the roadway at minimal clearances required extra care in setting the roadway’s vertical alignment.