Client
Highland County Engineer
Location
Hillsboro, Ohio
Services
Surveying Services
Traffic Studies
Alternative Development/Evaluation
Drainage Analysis & Design
Maintenance of Traffic
Lighting Design
Traffic Signal Design
Traffic Control
Right-of-Way Plan Development
Carpenter Marty Transportation provided engineering design services for the replacement of 0.44 miles of roadway, widening the existing pavement to three lanes, allowing for a new center two-way left turn lane, and extending the roadway 4,200' to SR 73. Prior to the completion of this project, Hobart Drive was a dead-end urban collector within the City of Hillsboro. Hobart Drive services Southern State Community College and several other commercial businesses and government agencies. The project included the design of a modern single lane roundabout at the intersection with Careytown Road.The roundabout is considered a “high speed” roundabout with both Carl Smith Drive and Careytown Road having legal speeds over 50 mph, so large reverse curves with 300’ splitter islands were designed on all four legs. This was the first roundabout designed in ODOT District 9, but the JAC-CR 9-0.12 roundabout (also designed by Carpenter Marty Transportation) was constructed shortly before this one. Improvements to the SR 73 and US 62 intersection by providing turn lanes and traffic signals for access to Hobart/Carl Smith Drive were also completed. Additional improvements made to Careytown Road south of the new roundabout intersection included a right-in, right-out intersection at Harry Sauner Road, replacement of the existing traffic signal, and the addition of a concrete median and drainage improvements along Harry Sauner Road. Carpenter Marty Transportation also provided significant public involvement and coordination with the City of Hillsboro.
As an add-on to the roadway project, Carpenter Marty Transportation was tasked to provide engineering design services for sidewalks along the project length. The initial project was design for future sidewalks, so the grading was in place for sidewalks to be constructed with minimal impacts to the project. Concrete sidewalks and curb ramps were provided along 4900' of Hobart/Carl Smith Drive from US 62 to the newly constructed roundabout at Careytown Road, as well as 2100' along Careytown Road and a portion of Harry Sauner Road. This portion of the project also included minor improvements such as sign relocation, storm sewer and utility adjustments, and removal and relocation of several light poles.
