Redlands Parkway Roundabout
Improving Intersection Safety and Addressing Traffic Volumes
ABOUT THE PROJECT
The SH 340 & Redlands Pkwy Roundabout project was created to improve the safety of the SH 340 & Redlands Parkway intersection, which experienced 28 accidents from 2010 to 2015, the vast majority of which involved rear-end and left-turning accidents. Improving the safety of the intersection is the project’s top goal, in addition to enhancing aesthetics of the intersection and addressing future projected traffic volumes.
This $5 million project included converting the existing signalized intersection at SH 340 (Broadway) and Redlands Parkway to a roundabout, roadway resurfacing, pavement reconstruction, guardrail improvements, drainage improvements, sidewalk construction, ADA improvements, and signing and striping. Ulteig was selected to provide Construction Management, Inspection, and Public Information services. The project has posed many challenges during the construction phase, including the requirement to keep the intersection open during construction. To meet this goal, our team designed a temporary roundabout as an alternative phasing plan that was ultimately implemented on the project. This was an innovative solution for both CDOT and Ulteig, and posed many challenges while designing the temporary roundabout, especially related to turning movements. However, the implementation of this temporary roundabout proved to be the optimal solution and allowed traffic to continuously flow without stopping construction.
As a result, the project has experienced several benefits, including a reduction in the project phasing, which helped expedite the project timeline, a significant reduction in queue at the intersection from one minute 35 seconds to 25 seconds. Additional benefits include zero CDOT-reportable accidents on the project to date and a cost savings to the taxpayers of approximately $250,000 by eliminating the need for temporary traffic light signals and a reduction in other traffic control devices. The result has been a project that is completed ahead of schedule and under budget.
Ulteig received three awards for this project: the 2018 Engineering Excellence Honor Award from ACEC, the CCA Project Management Award and the Excellence in Concrete Paving Award from ACPA.