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Start of construction - Summer 2011 Projected construction completion - January 2013 Move utilities - late 2010/early 2011 Improvements National Ave. to Montana Ave. - transition to 5 lanesMontana Ave. to Washington St. - 4 lanes/sidewalks/turn lanes Washington Ave. to Kelleher St. - transition down to 2 lanes Construct a 5 ramp interchange over I-15 Add auxiliary lanes along the outside of I-15 between Custer Ave. and Cedar St. Repave Washington St. from Custer Ave. to Cedar St. Upgrade the York Road Intersection to provide southbound motorists a slip-lane to westbound Custer Regional storm drainage system |
 Start of construction - May 2010 Project was completed by Helena Sand & Gravel in late July, 2010, nearly 20 days ahead of schedule. Improvements Montana Ave. to I-15 - 4 through lanes and a center turn laneI-15 Overpass Bridge - remove raised median, add travel lanes I-15 to Washington St. - provide additional westbound lane Southbound I-15 off-ramp at Cedar St. - add a lane Storm drainage system improvements |
Start of construction - September 2010 Project completed - Summer 2011 Improvements Realign the two lane Frontage Road to connect with Washington St.Install a roundabout intersection north of Custer Ave. Storm drainage system improvements |
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The Corridor- Project History and Development: The Custer Interchange Project is located within the urban limits of Helena, MT along a number of routes. All of the routes within the project area are at least 40 years old. Although many of the routes in question have seen improvements over the years, increases in population and changes in land use have resulted in increases in traffic volumes on I-15 and the surrounding roadways. This has decreased the operating efficiency of I-15 and the interchanges, as well as the east-west roadways that serve and cross I-15. Rationale: The Montana Department of Transportation's intent is to improve the operational efficiency within the entire corridor as quickly as possible (which includes safety). The order in which projects are initiated will depend upon many factors that the MDT and the Transportation commission will consider as they go through the project development process. These elements include, but are not limited to; design complexities, right-of-way acquisitions, maintaining essential services such as utilities and access to businesses, the size and cost of individual projects and the adequacy of available funding for those projects. |
