Studies & Assessments for Interstates
AGS Feasibility Study
Advanced Guideway System (AGS) Feasibility Study - This study is a result of the Colorado Department of Transportation's (CDOT’s) and FHWA’s selection of the I-70 Mountain Corridor Preferred Alternative which specifies in order to best meet the purpose and need of a transportation solution on the Mountain Corridor, a multi-modal solution is needed including implementation of an Advanced Guideway System (AGS). Keywords: Studies, Interstates, Non-highways
I-25 Valley Highway Environmental Impact Statement (EIS) and ROD
November 2006 - The Final Environmental Impact Statement (EIS) for the Valley Highway Project details the Preferred Alternative and project phasing for the reconfiguration and redesign of I-25 between Logan and US 6 (6th Avenue) and elements of US 6 from I-25 to Federal Boulevard. The purpose of the Record of Decision (ROD) is to document the FHWA’s decision on the I-25 Valley Highway Project. Keywords: Studies, Interstates
I-25, Colorado Springs to Monument Environmental Assessment
March 2004 - Draft Section 4(f) Evaluation - Environmental Assessment on I-25 Improvements through the Colorado Springs Urbanized Area. Keywords: Studies, Interstates
I-70 B West Study
The Colorado Department of Transportation (CDOT) and the Federal Highway Administration (FHWA) in coordination with the City of Grand Junction, Mesa County, and the Regional Transportation Planning Office (RTPO) are considering improvements to the I-70B Corridor in Grand Junction, Colorado. The I-70B West study corridor is approximately four miles in length and extends from 24 Road on the west to 15th Street on the east. Keywords: Studies, Interstates
I-70/32nd Avenue Interchange Environmental Assessment
October 2006 - The City of Wheat Ridge identified the area southwest of the Interstate 70 / State Highway 58 (I-70/SH 58) interchange as an urban growth area with potential office, commercial, and retail land use to begin development in the next several years (City of Wheat Ridge 2005). Land use in the area southwest of the I-70/SH 58 interchange is changing from previous aggregate mining to retail and commercial use, as identified in the City of Wheat Ridge Comprehensive Plan (City of Wheat Ridge 1999, as amended in 2005). The proposed change in land use, in conjunction with regional growth, will affect traffic operations at this interchange and on the local arterial streets in the vicinity of the interchange. Keywords: Studies, Interstates, Environmental Assessment, EA
I-70 Mountain Corridor
The Colorado Department of Transportation (CDOT) and the Federal Highway Administration (FHWA) announced February 26, 2010, that a revised Draft Programmatic Environmental Impact Statement (DPEIS) will be prepared for the I-70 Mountain Corridor to expedite the completion of the Final PEIS. The revised DPEIS will be presented in a reader-friendly format that is understandable to the general public, and will provide the appropriate level of information required by the National Environmental Policy Act (NEPA) for this level of study. Keywords: Studies, Interstates
I-25 and Arapahoe Road/SH 88 Interchange Environmental Assessment & FONSI
August 2012 - This Environmental Assessment (EA) was prepared under requirements of the National Environmental Policy Act (NEPA) to determine if the Action Alternative could have significant impacts on the human environment. February 2013 - This Finding of No Significant Impact (FONSI) was prepared under requirements of the National Environmental Policy Act (NEPA). Also included, Final System Level Feasibility Study from June 2008. Keywords: Studies, Interstates
I-25 Central Planning and Environmental Linkages (PEL) Study
Keywords: Active Studies, Interstates
I-25 Through Pueblo - New Pueblo Freeway EIS and ROD
April 2014 - The Final Environmental Impact Statement (EIS) for the New Pueblo Freeway details the Preferred Alternative and project phasing for the reconfiguration and redesign of I-25 through Pueblo. The purpose of the Record of Decision (ROD) is to document the FHWA’s decision on the New Pueblo Freeway Project. Keywords: Studies, Interstates
I-70 East Environmental Impact Statement (EIS)
In July 2003, CDOT and Denver’s Regional Transportation District (RTD) began a joint study effort called the I-70 East Corridor Environmental Impact Statement (EIS). An EIS is typically a three to five-year decision-making process required before any major federally-funded transportation project can be built. The EIS ensures that issues affecting the community and the environment are identified and considered before making a final decision. The process is conducted by local, state, and federal agencies and is a requirement of the National Environmental Policy Act (NEPA). The purpose of the I-70 East Corridor EIS was to improve transportation along the I-70 highway corridor from I-25 to Tower Road and to explore potential rapid transit options from Downtown Denver to Denver International Airport. Keywords: Studies, Interstates
I-70 Mountain Corridor Context Sensitive Solutions
CDOT has committed to using Context Sensitive Solutions (CSS) on the I-70 Mountain Corridor. The I-70 Mountain Corridor CSS guidance contained in this Web site includes the Context Statement, the Core Values, a Decision-Making Process, stakeholder comments, background information, maps, plans and legal commitments, and other tools to implement CSS throughout the corridor. Keywords: Studies, interstates
I-70 Mountain Express Lane
Keywords: Construction Complete, Studies, Interstates, Peak Period Shoulder Lane, I-70 Mountain Corridor
I-70 Reversible (Zipper) Lane Study Phase I
Gerogetown to Floyd Hill - Phase 1 Feasibility Study - August 10, 2010 Gerogetown to Floyd Hill - Phase 1 Feasibility Study - August 10, 2010 -The Colorado Department of Transportation (CDOT) is considering a reversible zipper lane on I-70 west of Denver to manage congestion during peak times on winter Sundays. The current strategy under consideration calls for an eastbound reversible lane to begin west of Empire Junction (approximately Milepost 230.5) and for the lane to terminate at the base of Floyd Hill (Milepost 244.0). Keywords: studies, interstates, zipper lane
I-70 Reversible (Zipper) Lane Study Phase II
December 2012 - This Phase II I-70 Reversible Lane Feasibility Study report provides information on the benefits and risks associated with Reversible Lane implementation along the I-70 Mountain Corridor. This document builds on the information provided in the Phase I analysis and discusses the trade-offs that must be considered prior to implementation. Keywords: Studies, Interstates, zipper lanes, reversible lanes
I-70 Silverthorne/Dillon Interchange Study
The Colorado Department of Transportation (CDOT) is conducting a study of potential improvements to the Interstate 70 (I-70) interchange with U.S. Highway 6 and State Highway 9, located in the Town of Silverthorne in Summit County (Exit 205). Keywords: Studies, Interstates, I-70 mountain corridor
I-70 West Operations Plan (2015-2016)
Keywords: Interstates, Studies
I-70/Kipling Interchange PEL Study
The I-70/Kipling PEL Study will provide an understanding of the existing conditions of the interchange and develop a range of improvements to reduce congestion and improve operations and safety of the interchange area along I-70 and Kipling Street (SH 391). Keywords: Studies, Interstates
I-76 and Bridge Street Environmental Assessment (EA) and Finding of No Significant Impact (FONSI)
The proposed I-76 and Bridge Street Interchange Project is located in Brighton, Colorado, in Adams County. The City of Brighton proposes to construct an interchange at I-76 and Bridge Street on the eastern side of the city. The proposed interchange would provide an opportunity to increase regional east-west connectivity across State Highway 7. This regional connectivity will become increasingly important with future population growth and increased travel demand. Keywords: Studies, Interstates
I-225 PEL Yosemite Street to I-25
CDOT is conducting a Planning and Environmental Linkages (PEL) study to improve conditions along Interstate 225 (I-225) from Yosemite Street to I-25 in Denver. Keywords: Studies, Interstates, PEL
North I-25 EIS
The Federal Highway Administration (FHWA), in cooperation with the Colorado Department of Transportation (CDOT), have initiated preparation of an Environmental Impact Statement (EIS) to identify and evaluate multi-modal transportation improvements along approximately 70 miles of the I-25 corridor from the Fort Collins-Wellington area to Denver. The EIS will address regional and inter-regional movement of people, goods and services in the I-25 corridor. Keywords: Studies, Interstates, Active Construction

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