Evaluation of the Use of a Road Diet Design: An Urban Corridor Case Study in Washington, DC

A traditional road diet design converts a four-lane two-way to three-lane consisting of two through lanes and center left turn lane. This paper introduces new application the in an urban corridor. Specifically, into two-lane with full-time parking both directions. The analyzed traffic impacts on corridor New Jersey Avenue, northwest, city Washington, District Columbia. included five signalized one unsignalized intersections. Before-and-after analyses using Synchro 11 simulation Site-Specific Empirical Bayes analysis were used evaluate compare existing proposed scenarios. scenario provided various benefits including offering accessibility businesses area acting as calming strategy. For intersections, overall performance remained same for most intersections except intersection (on P Street), it is significantly impacted by due dramatic increase volumes its minor streets result diverting from movements. Results showed that use enhanced volume divergence safety study decreasing annual number predicted crashes. To achieve better operational reflect demands, recommends re-optimize signal timings when adopted.