McKaig/Dorset Roundabout

Draft Concept LJB

Why is this intersection being redesigned?
The intersection does not operate efficiently as a 4-way stop leading to long delays at times and unnecessary stops at others.  For several years, the City has recognized that improvements need to be analyzed to improve movement at the intersection while not forfeiting safety. In 2017, the City hired LJB, Inc. of Miamisburg Ohio to perform an intersection analysis.  The recommendation of the analysis was the installation of a roundabout or traffic signal, with a roundabout being the preferred alternative.

How does a roundabout work?  
Watch this short video from the Ohio Department of Transportation on navigating a roundabout.

Why was a roundabout chosen over a traffic signal?
The roundabout was chosen as the best option as it pertains to level of service, safety and life cycle cost. The level of service refers to delay of the drivers.  At this intersection, a roundabout will allow freer movement, reducing delay for drivers, and continue to perform well into future years. Roundabout intersections are safer than intersections with traffic signals because speeds are reduced and conflict points for drivers are reduced from 32 to 8. The proposed roundabout has a lower life cycle cost than a traffic signal because there are no signals to maintain continuously and replace every 10-15 years.

Was there ever a plan for a traffic light at the intersection?
The thought was that a signal would be installed at this intersection several years ago, based on peak hour traffic counts completed at the intersection of McKaig Avenue and Dorset Road.

Will large vehicles such as trucks and buses be able to navigate the roundabout?
Yes, trucks and buses will be able to traverse the intersection. The design consultant LJB, Inc. has analyzed this in detail and applied turning movement truck and bus templates to the layout of the intersection.

Where did the data in the study come from?
Data sources include the Federal Highway Administration and traffic counts conducted by LJB, Inc.

What is the timeline for this project?
The design is currently in progress. Design should be completed in the next couple of months with authorization to construct requested of Council in April 2018. At this time, Staff is anticipating construction to begin at the intersection this summer with the remaining construction between Heywood Elementary and the intersection occurring in the fall of 2018.  Once the project is bid, the construction schedule will be finalized with the contractor.

I live, work, or travel through the area. How will I know what is going on with the project?
Regular updates and information will be provided prior to and throughout construction via updates on this page, as well as the City’s Facebook, Twitter, and Instagram.