Innovative Roundabout Solutions
Roundabouts are highly cost-efficient. They reduce accidents, increase mobility, reduce air pollution, and cost less to maintain. CHA is cost-efficient too. Our expertise in roundabout design is the result of working on many projects. Certainly, each one was unique, but something we have encountered from one project might be priceless in designing another project. There are no off-the-shelf answers. Design involves superior attention to technique, consideration of the smallest details, and significant experience. Our knowledge base affords us the opportunity to spend our time effectively. Superior experience yields superior results.
US 31 Reconstruction Hamilton County, IN
CHA partnered with the Indiana Department of Transportation to transform and upgrade 13 miles of signalized arterial to a full freeway facility which improved transportation on US 31 between I-465 and SR 38 in Hamilton County. The reconstruction project included 46 bridges, 21 roundabouts, and 11 interchanges. INDOT completed the reconstruction project two years ahead of schedule and over $100 million under budget. Part of the reconstruction project included 21 roundabouts (some of the first-ever built by INDOT). Some roundabouts, like the six “backto-back” roundabouts at 136th Street (pictured to the left), could be the most complex series of roundabouts in the country. The sustainable, innovative design included 46 bridges and 21 roundabouts, which have allowed for new residential markets and new economic growth. In efforts to reduce the cities’ carbon footprint, US 31 incorporated pedestrian connectivity that allows pedestrians access at all over/underpasses and interchanges. Bicycle access was coordinated with respective local plans.
Morrison Road & Jackson Street Delaware County, IN
Approximately 1.5 miles of Morrison Road was reconstructed, and its existing intersection was converted into a single-lane roundabout. The project was separated into two phases, over $6 million. CHA provided design services, a traffic analysis, survey, environmental documents, a geotechnical investigation, utility coordination, right of way services, construction documents and cost estimates.
Keystone Parkway & 96th Street Carmel, IN
CHA provided the design and traffic studies for a new split-grade interchange on Keystone Parkway. We developed a six-lane bridge to carry Keystone Parkway over the newly widened 96th Street. Three additional roundabouts were designed in addition to the roundabout interchange, as well as a collector-distributor roadway between 96th Street and I-465. To improve local traffic flow, three new connector roads were also designed.
Marlboro, Main, and Winchester Street Intersection Keene, NH
This intersection, a gateway to the downtown, was improved to accommodate high volumes of traffic from nearby Keene State College. Throughout the project’s design, we utilized extensive input from stakeholders, abutters, and the general public. Various alternatives to improve the intersection were produced, including an evaluation of roundabouts vs. traditional signalized intersections. Traffic calming measures were also developed to mitigate traffic issues through the intersection.
US Route 62 & NY Route 391 Hamburg, NY
US Route 62 and NY Route 391 underwent 1.85 miles of full depth reconstruction, including four roundabouts. Improvements also included pedestrian and bicycle accommodations, improved intersection geometry, traffic calming features, signal upgrades, additional turn lanes, a new drainage system, and highway lighting. CHA led design, alternatives development, an air quality and noise analysis, a four-day charrette, right-of-way acquisition, and construction sequencing.
Newport Road & County Road New London, NH
This roundabout was selected as the preferred alternative through a public outreach program. This federally funded project featured 2,000 feet of sidewalk extension, upgraded water mains, partial underground relocation of aerial utilities, access management techniques, traffic calming features, landscaping/streetscaping, and a closed drainage system.
US 29/Greentop Road & US 29/ Hal Jones Road Mini-Roundabouts Coweta County, GA
CHA had previously improved these two adjacent intersections incorporating operational and safety upgrades as part of CHA’s on-call services contract with Coweta County. Four years after completion of the project, Coweta County and GDOT District 3 Traffic and Safety Office sought to improve the Level of Service of the two intersections and combined funding to develop the project. The County approached CHA with a request to design mini-roundabouts at each intersection, and to do so within the confines of existing pavement. Both CHA’s Atlanta and Indianapolis Transportation Offices collaborated to develop the design and construction plans for these unique adjacent mini-roundabouts on a state route. Construction of the mini-roundabouts was funded by GDOT as part of their Quick Response Projects that places a $200,000 cap on construction. GDOT split the two mini-roundabouts into separate contracts. Each project has been let and construction was completed in Summer of 2018.
Experience 96th Street/Cumberland Road Carmel, IN
191st Street/US 31 Carmel, IN
96th Street/Delegates Row Carmel, IN
Adams Road/Fir Road St. Joseph County, IN
96th Street/Haverstick Road Carmel, IN
Center Road/Webster Street Kokomo, IN
96th Street/Hazel Dell Road Carmel, IN
Champlain Parkway/Southern Connector Burlington, VT
96th/Keystone Parkway Carmel, IN
Cleveland Road/Ash Road Elkhart County, IN
106th Street/Gray Road Carmel, IN
Ditch Road/141st Street Carmel, IN
106th Street/Pennsylvania Street Carmel, IN
Edison Road/Ash Road St. Joseph County, IN
116th Street/Pennsylvania Street Carmel, IN
Glenridge Road Glenville, NY
131st Street/Pennsylvania Street Carmel, IN
Golf Gardens Development Abu Dhabi, UAE
131st Street/US 31 Carmel, IN
Lowes Way Connector/Lowes Entrance Carmel, IN
136th Street/Rohrer Road Carmel, IN
Maple Avenue Keene, NH
136th Street/Smokey Row Carmel, IN
Marlboro, Main, and Winchester Street Intersection Keene, NH
136th Street/US 31 Carmel, IN
Meridian Street/McKenzie Road Greenfield, IN
161st Street/US 31 Carmel, IN
Milford Road/Grand River Road/Pontiac Trail Lyon Township, Michigan
Moores Pike/Windfield Road/Renwick Blvd. Bloomington, IN
Southeastern Parkway/Cyntheanne Road Fishers, IN
Morrison Road/Jackson Street Delaware County, IN
SR 19/SR 119 Wakarusa, IN
Newport Country Road New London, NH
Swanzey Factory Road/Route 12 Swanzey, NH
NY Route 5 Reconstruction Buffalo, NY
Towne Road/126th Street Carmel, IN
Oak Hill Road/Kansas Road Vanderburgh County, IN
Towne Road/Glebe Street Carmel, IN
Oak Hill Road/Millersburg Road Vanderburgh County, IN
Tripoli Waterfront Entrances Tripoli, Libya
Old US 30 & CR350W Kosciusko County, IN
US 29/Greentop Road Coweta County, GA
Old US 30 & Fox Farm Road Kosciusko County, IN
US 29/Hal Jones Road Coweta County, GA
Old US 30 & Zimmer Road Kosciusko County, IN
US Route 4/Harris Hill Road Boscawen, NH
Sand Creek Road Colonie, NY
US Route 62/NY Route 391 Hamburg, NY
Schutt Road (Dunning Rd. to N. Galleria Dr.) Wallkill, NY
Vale Park Road/Silhavy Road Valparaiso, IN
Shelbourne Road/121st Street Carmel, IN
Walnut Street/Riggin Road Muncie, IN
Shelbourne Road/126th Street Carmel, IN Shelbourne Road/131st Street Carmel, IN
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09/2021
Lee Ecker, PE 518.453.3984 lecker@chacompanies.com