Gros Ventre Roundabout
The Gros Ventre intersection on US Hwy 26/89/191 has an average daily traffic volume of approximately 14,200 vehicles and almost 200 bicycle riders during the summer season. Safety concerns have been identified at this location, and the Federal Highway Administration indicates that this type of intersection has the greatest safety risks of any type of intersection in the country. It is a high-speed, two-lane rural road with an unsignalled intersection.
Project Timeline and Construction Impacts
Construction began April 2. During construction, two-lane traffic will be open most of the time on the highway, except in certain instances for specific construction activities. Traffic delays are expected for the highway, Gros Ventre Road and Sagebrush Drive from early spring into the fall.
Travel Restrictions During Construction
From April 1 - November 30 US Highway 89 - north and south direction, Sagebrush Drive and Gros Ventre Road - west and east direction:
Gros Ventre Junction Temporary Bypass
A roundabout is a circular roadway at an intersection designed to expedite the flow of vehicle traffic through an intersection and reduce accidents, as well as a reliable design to slow traffic through the area. It also provides an opportunity for pedestrians and bicyclists to navigate the intersection safely and efficiently.
14,200 vehicles per day (2014 summer season)
PATHWAY AVERAGE DAILY BICYCLE USE AT GROS VENTRE JUNCTION
190 bicycles per day (2014 summer season)
Gros Ventre Junction Roundabout - 2018
NPS and FHWA, April 2015
Summary Findings: A roundabout will result in the best combination of improved safety for both vehicles and pathway users.
The National Park Service, in partnership with Federal Highways, Wyoming Department of Transportation and Teton County, conducted safety audits and analyses, and evaluated several alternative solutions to the issue. A roundabout was determined to be the best safety improvement for pathway users, highway users and wildlife, as well as the best balance of safety, protection of scenic views and cost. Other considerations included tunnels under the highway and Gros Ventre Road, bridge underpass with additional pathway, pedestrian bridge, overpass or underpass with on and off ramps, stop light, and activated pedestrian crossing.
Last updated: July 17, 2018