On August 14, 2009, the Federal Highway Administration approved and signed the Record of Decision for the I-70 Supplemental Environmental Impact Statement.
I-70 Supplemental EIS Record of Decision

Final Reader-Friendly SEIS (May 29, 2009)
Final SEIS viewing locations

NEW: Reevaluation of SIU3 (March 2021) 

NEW: Reevaluation of SIU6 (March 2020) 

NEW: Reevaluation of SIU3 (May 2020) 

Four-State "Corridors of the Future" Feasibility Study (Missouri-Illinois-Indiana-Ohio)

I-70 is the most important transportation corridor in Missouri, connecting the state’s two largest cities and carrying more rural daily traffic than any other route. The interstate has been an engine for nearly 50 years of economic growth and prosperity.

But today, many portions of the facility are strained beyond capacity, increasing delays and dampening economic activity. Deteriorating pavement and poorly functioning interchanges compound the problem and make travel on I-70 a daunting experience. And the problems are not exclusive to the metropolitan areas. By the year 2030, all segments of I-70 are expected to operate at unacceptable levels of service – meaning unstable traffic flow, stop-and-go conditions and traffic volumes over the roadway’s capacity.

The safety and economic prosperity of Missourians depends, in part, on an I-70 that grows along with the state and nation. That’s why The Missouri Department of Transportation is working now to develop a plan for the future of I-70.

Look inside to learn more about Improve I-70, and find out how you can participate in this important planning effort.