Photo: Concept Drawing

Project Detailsx

Client: City of Dallas
Job Status: Under Final Design
Location: Dallas, Texas
Scope: 2-Way Roadway Conversion with Roundabout and New Signals
Services: Municipalities, Water Resources, SUE, Survey

Project Overviewx

Tyler Street and Polk Street served as a two-way couplet for approximately one mile near the Bishop Arts District in Dallas, TX. The two roadways serve as a thoroughfare for commuters and provide direct access to both homes and businesses. Hayden and city staff analyzed whether the corridor could be converted into two 2-way streets bounded by a new signalized intersection on the south end and a roundabout on the north end. The analysis and resulting report concluded that it could, and as such Tyler Street would be a four-lane undivided roadway with periodic on-street parking while Polk would be a two-lane undivided street with a bicycle lane and permanent on-street parking.

Because of the two-way conversion, nine existing intersections within the corridor needed to be reconfigured with new signalization and partially reconstructed to accommodate the new traffic patterns. Each intersection was individually evaluated for ADA compliance, and Hayden created intersection reconstruction plans with new striping for each intersection requiring changes.

A unique challenge on this project was developing the construction sequencing plan of the roundabout, the new signal, and the reconstruction of the nine intermediate intersections with signals in the corridor. These sequencing plans had to be integrated into the overall corridor conversion from a two-way couplet into two 2-way streets. Hayden provided a detailed narrative with phasing plans to specify the construction order specifically focusing on the construction phasing of the roundabout as it related to the jointing plan.

There were also approximately 350 LF of small diameter (6”-12”) waterline improvements, 500 LF of large diameter waterline improvements (20”), 200 LF of 8” wastewater improvements and 200 LF of drainage improvements. Hayden was responsible for the full topographic and boundary survey of the corridor, as well as performing Subsurface Utility Engineering (SUE) Quality Level B designation for the entire project limits.