Roundabout Project Update.  On May 28, the City will close a portion of Murray Lane and Holly Tree Gap to begin construction on a roundabout at that intersection.

The intersection of Murray Lane and Holly Tree Gap currently functions as a three-way stop, which causes traffic delays during peak commuting and school traffic times.  Continued growth in the unincorporated areas of Williamson County that flows through this intersection is anticipated, and the delay at the intersection will continue to increase. The fact that the intersection is a three-way stop is especially problematic for safety.

TRAFFIC STUDY LINK

 In 2019 a traffic study was conducted, and three options were considered; construct a roundabout, install a traffic signal, or continue as is. The study concluded that a roundabout was the best overall alternative from a traffic flow perspective.  The study also included review of crash history data related to this intersection obtained from the Brentwood Police Department. Five total crashes were reported which included four rear-end crashes and one angle crash for the period of 2018 and 2019. Federal research evaluating before/after conditions of converting a controlled at grade intersection to a roundabout determined a 35% reduction in overall crash frequency and a 76% reduction in severe injuries.

In early 2022, the final design work on the proposed roundabout and property acquisitions of nine impacted tracts are underway.  Construction is estimated to possibly begin in 2023.

Detour Map 

 Rendering