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Interstates that changed the most from planning stage to building stage

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planxtymcgillicuddy:
As the title implies, what interstates changed the most from when their routes were being laid out to when they actually got built? Could be on a local, state or national level. I guess for North Carolina, the biggest ones would be I-40's extension from Raleigh to Wilmington, as many in the region favored a route that utilized a fully upgraded US-421 to Wilmington instead of the route that parallels/criss-crosses US-117 that ends a few miles north of Wilmington, and the routing of I-77 north of the US-421 interchange in Elkin, with at least two different routings proposed before the Fancy Gap route was selected.....one through Lowgap and Galax, Virginia en route to Fort Chiswell, and one following US-21 up the mountain to Sparta and Speedwell, Virginia enroute to Wytheville

1995hoo:
I-95 in New Jersey, perhaps?

ilpt4u:
I-64 across IL&IN between STL and Louisville was originally planned to follow US 50 in IL and US 150 in IN, but some lobbying by Evansville IN and Mt Vernon IL pushed the routing further south to today’s route/roughly following old US 460 in IL

planxtymcgillicuddy:

--- Quote from: ilpt4u on June 27, 2023, 07:19:09 PM ---I-64 across IL&IN between STL and Louisville was originally planned to follow US 50 in IL and US 150 in IN, but some lobbying by Evansville IN and Mt Vernon IL pushed the routing further south to today’s route/roughly following old US 460 in IL

--- End quote ---

I think I-64 on a national level would be the winner for interstate that changed the most from planning stage to building stage, with the US-50/150 routing in Indiana and Illinois, the proposed US-60 routing through Ansted and Rainelle to Sam Black Church in West Virginia, and the Roanoke/Lynchburg/Farmville routing en route to Richmond and Norfolk in Virginia

Big John:
I-43 was supposed to be I-57 and follow the WI 57 corridor.

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