Studies & Assessments for 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-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-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-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

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 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

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-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

North I-25 Planning Environmental Linkage (PEL) Study

The North I-25 PEL Study will investigate the more localized congestion in the general purpose lanes and define a range of improvements needed to reduce congestion, and improve operations and safety of the section of Interstate 25 from US 36 to State Highway 7 as well as that of the interchange connectors. Keywords: Construction Complete, 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 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 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-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-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

Ports to Plains

This study was a joint effort by four state Departments of Transportation (DOTs) including Colorado, Texas, Oklahoma, and New Mexico. It includes I-70 from I-25 east to US 40/287 and then south along US 40/287 to the Colorado/Oklahoma border. The purpose was to create a Development and Management plan for the Ports to Plains Corridor, which outlines a proposed plan for the corridor and serves as an essential tool for securing federal funding for corridor development. It contains several elements that improve the transportation network’s ability to move people and goods. Nearly 1,400 miles long, the corridor consists of 511 miles of 4- to 6-lane roadway, 755 miles of 2-lane roadway, and 113 miles of roadway in metropolitan areas. Keywords: Studies, US Highways, Interstates

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