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County and ITD studies highlight need for major road investments in Greater Rigby Area
Summary
Committee reviewed traffic analyses (ITD/Horrocks) showing severe congestion at county-line corridors and discussed multi-agency cost-sharing for potential solutions, including an ITD-led phased upgrade of Hwy 20 between Idaho Falls and Rexburg.
Committee members discussed recent traffic modeling and options prepared by ITD and Horrocks Engineering for congested corridors near the county line and Highway 48. Kristine Warner summarized that traffic at the county-line approach is at a level F and that ITD has proposed multi-scenario solutions, including potential overpass options and long-term corridor widening; Horrocks provided four solution scenarios and ITD is planning a multi-year upgrade that could expand Hwy 20 to six lanes between Idaho Falls and Rexburg.
Warner said that right-of-way acquisition and construction costs will be large and financing will likely come from a mix of developers, Bonneville County, Jefferson County and ITD. The County Commissioners are planning an open house to present Horrocks' solutions and collect public input on funding and design choices.
