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Air Rail Highway Bike/Ped Public Transit
Project Information > Roundabouts
PlymouthIn 1903 the Columbus Circle opened in New York City, this was the first traffic circle to be built in the United States. Traffic Circles were constructed in New Hampshire from about the 1940’s to 1960’s. They fell out of favor beginning in the 1960’s because they relied on high speed merging of traffic and the traffic in the circle yielded to traffic entering causing traffic jams. While traffic circles fell out of use in the US many European countries modified the design and eventually created the modern roundabout. The modern roundabouts have since gained renewed interest in the US because of the safety benefits, high capacity, traffic calming effect, and aesthetic value they can bring to an intersection.

 

NashuaThe information below is intended to answer some common questions and provide additional information to communities and the general public as to what roundabouts are and how they operate.

Also included are NHDOT roundabout design guidelines that supplement the FHWA Roundabout Guide.

Brochures

Simulations

Informational Posters

Photos of Roundabouts in New Hampshire

  • Nashua - Main Street at DW Highway - 1 | 2 | 3
  • Nashua - NH 130 (Broad Street) at Nashua North HS (by City)- 1 | 2 | 3
  • Meredith - US 3 at NH 106 (Parade Road)- 1 | 2 | 3 | 4
  • Plymouth - US 3 at NH 175A - 1 | 2 | 3 | 4
  • Hanover - NH 10 (built by Town) - 1 | 2 | 3 | 4
  • Keene - Court Street at Cheshire Medical Center (by City)- 1 | 2
  • Keene - NH 101 at Winchester Street - 1 | 2 | 3 | 4
  • Keene - Main Street at Winchester Street (by City) - 1 | 2 | 3
  • Peterborough - NH 101 at shopping center - 1 | 2 | 3
  • Rye - NH 1A at Elwyn Road (Foye's Corner) - 1 | 2 | 3

Design Information

Private Roundabout Web Site Links

Additional Web Site Links





New Hampshire Department of Transportation
PO Box 483 | 7 Hazen Drive | Concord, NH | 03302-0483
Tel: 603.271-3734 | Fax: 603.271.3914

copyright 2009. State of New Hampshire