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Interstate 40 Widening

Wilson County

Overview

The project for Interstate 40, from east of State Route 109 to east of Interstate 840 in Wilson County, consists of widening the roadway for approximately 3.5 miles. The planned improvements are designed to improve safety and mobility along this section of the I-40 corridor.

Purpose and Need

This section of I-40 is located east of Nashville. Traffic counts along this heavily-traveled stretch average roughly 70,000 vehicles per day. Widening the roadway from east of SR 109 to east of I-840 will increase capacity and improve operations by adding lanes to accommodate current and future traffic volumes. The eastern end of the project will also tie-in to the previously widened section of I-40, between Central Pike and SR 109, which was completed in 2014.

Design

The existing roadway is four-lane facility divided by a concrete or grass median barrier, depending on location. The planned project will widen the interstate to eight 12’ lanes (four lanes in each direction) with 12’ shoulders inside and outside, plus a concrete median barrier throughout. Most of the widening will take place within the existing median. Five retaining walls will be added to keep the proposed work within the existing right-of-way. The bridge over Barton’s Creek will also be widened as part of the project.