Frequently Asked Questions (FAQs)
I-270 Corridor Improvements Frequently Asked Questions
The project website contains information about the project background and development schedule. CDOT is dedicated to maintaining a transparent public involvement process and is conducting extensive public outreach efforts to share project impacts with corridor users and the diverse populations along the project area.
The Federal Highway Administration and the Colorado Department of Transportation initiated an Environmental Impact Statement (EIS) to evaluate ways to improve the I-270 corridor. CDOT and FHWA began a NEPA process in 2020, initially anticipating an Environmental Assessment. Moving into 2023, CDOT determined a more detailed environmental review was needed and requested an EIS be prepared. CDOT recognized that I-270 corridor improvements are necessary, and minimizing environmental and community impacts is important. CDOT and FHWA gathered input from residents and businesses in the area, highway and transit users, and other interested groups on how to improve the corridor and minimize negative impacts.
You can review the Final Environmental Impact Statement (FEIS), Record of Decision (ROD) & State Environmental Reports on the I-270 Corridor Improvements project webpage.
Express Lanes were chosen as the best alternative to modernize the highway and add travel time and reliability and user choice. This new lane will be a full-time tolled Express Lane along with two free general-purpose lanes in each direction of I-270.
The final EIS and ROD can be found on the Final Environmental Impact Statement (FEIS), Record of Decision (ROD) & State Environmental Reports webpage.
Improving the I-270 corridor is a priority for CDOT, FHWA, and local agencies. The I-270 corridor provides a key transportation link carrying more than 100,000 vehicles each day. It is a critical freight corridor for the region, with freight trucks making up nearly 10 percent of its daily traffic. Constructed between 1965 and 1970, I-270 no longer meets local and regional transportation demands. The interstate carries far more traffic than it was designed for, and travel delays are persistent. The pavement and bridges are stressed by the traffic loads, and emergency repairs to bridges and pavement are regularly needed. Crashes, emergency repairs, and planned maintenance require frequent closures of the highway, leading to slow and unpredictable travel times.
Express Lanes are new travel lanes built in addition to any existing general purpose lanes to provide drivers the choice of a more reliable trip by paying a toll, carpooling or riding transit. Toll prices are set to manage traffic and have just the right number of vehicles in the lane to provide reliable, shorter travel times.
On some Express Lanes, tolls can change depending on the level of congestion. As traffic increases, the toll goes up to make sure the lane remains a free-flowing alternative for travelers. Conversely, the toll price will decrease when there is less traffic in the lane. Drivers will always be charged the amount on the overhead sign when they enter the Express Lanes.
CDOT has implemented a network of Express Lanes along high-volume, congested highways throughout the Denver metropolitan area. Where implemented, CDOT has found (using INRIX traffic data) that travelers in all lanes (including the regular lanes) see time savings of anywhere from 20% to 50%. Drivers in the regular lanes are getting to home and work faster because some of the other drivers are choosing to pay a toll and use an Express Lane. For more information on Express Lanes, please visit codot.gov/programs/expresslanes.
In fiscal year 2023, Colorado’s Express Lanes generated approximately $34.8 million in toll revenue, up from $26.5 million in 2021. Revenues are projected to continue to increase as more lanes are added to the network and traffic volumes rise. Most of the revenue from tolls is reinvested in transportation infrastructure, including funding for new projects, maintaining existing Express Lane corridors, and repaying loans taken to build Express Lanes. Toll revenue is also used to expand transit infrastructure such as mobility hubs, support HOV 3+ carpooling programs, and integrate Intelligent Transportation Systems (ITS) on Express Lane corridors.
The Colorado Transportation Investment Office (CTIO) is responsible for implementing and managing Express Lanes as part of its overall mission to pursue innovative and efficient means of financing and delivering important surface transportation infrastructure projects across Colorado. As a business enterprise, CTIO is required to be self-sufficient in operations without direct reliance on state appropriations. Toll revenue also helps fund CTIO operations.
There is a lot of right of way (land owned by CDOT for the highway) in the I-270 corridor, and CDOT does not anticipate direct impacts to Sand Creek or other surface waters.
The project engaged in an extensive outreach program that employed various methods such as public meetings, bus tours, community listening sessions, stakeholder meetings, elected official meetings, and agency meetings. CDOT’s project team and bilingual community liaison hosted and attended community events, meetings, and volunteer opportunities to develop community alliances and agency partnerships to share information and gather feedback. Information was shared through many channels, such as in-person meetings, online meetings, and through website, email, and printed and video materials. The outreach team was out in the community throughout the study process to listen to ideas for the corridor. CDOT also conducted one-on-one interviews with local businesses and large employers to understand how I-270 currently affects customers and employees and how the project may impact businesses, both during and after construction.
The I-270 Corridor Improvements Project and CDOT’s I-25 (US 36 to 104th Avenue) Safety & Operations Improvements project, which includes improvements to a five-mile segment of I-25 from US-36/I-270 to the south and 104th Avenue to the north, terminates at the I-25/I-270/US 36 interchange. Neither project includes reconstruction of the system interchange. Although these are independent projects with no physical connection or correlation, the project teams are coordinating project development, outreach and design efforts since the projects have similar development timelines and stakeholder interest. Learn more about that project and provide your input here.
CDOT is also conducting a separate, independent project focused on improvements to Vasquez Boulevard from I-270 to 64th Avenue. The Vasquez Boulevard Improvements Project aims to improve traffic operations, safety and pedestrian connections within that area north of the interchange.
Redesign of the Vasquez Boulevard and I-270 interchange and ramps is included in the I-270 Improvements Project. The project would reconstruct the Vasquez Boulevard interchange as a new partial cloverleaf with loop ramps in the east and west quadrants; add traditional ramps in the north and south and provide a new movement from northbound Vasquez Boulevard to eastbound I-270. New sidewalks and crossings would be provided to make pedestrian and bicycle travel through the interchange safer.
CDOT’s CO 224: US 36 to US 6 Multimodal Improvements project is a separate but complementary project to the I-270 Improvements. It includes asphalt resurfacing and multimodal improvements on 3.6 miles of CO 224 between US 36 and US 6.
The project was originally limited to asphalt resurfacing, however, after engaging surrounding residents and Adams County Commissioners, CDOT allocated $14 million to add multimodal improvements to the CO 224 project. Multimodal improvements include sidewalks, lighting, ADA curb ramps, access to the Clear Creek Trail, access to the South Platte River Trail, drainage improvements, a new pedestrian crossing structure over the Burlington Canal, and intersection safety improvements.
Construction of the project is expected to begin spring 2025 and end summer 2026.
Freight considerations on I-270 are important for the project, community, and state. Colorado’s freight network plays a pivotal role in the state’s dynamic economy, serving as a critical backbone for the transportation of commodities. I-270 is an important part of this infrastructure and carries a large portion of freight truck traffic, connects to rail terminals, and serves as one of the only designated nuclear and hazardous materials routes through the area.
How freight moves on I-270 and through the area has potential safety, travel time, economic, and environmental implications for freight movement and deliveries regionally and locally in the surrounding community. Freight is an important economic driver in this area with numerous trucking companies and freight terminals surrounding I-270. Along I-270, between eight and 17 percent of daily I-270 traffic consists of heavy trucks. The unique operational needs of freight trucks are being considered as part of this project. The project team is engaging with the freight industry and local stakeholders to ensure improvements meet the identified transportation needs of freight operations on the corridor and reduce conflicts between freight and other corridor users.
CDOT expects there will be impacts due to construction activities. These could include, but not be limited to, travel delays, noise, dust, vibrations, access impacts and soil erosion.
To minimize or avoid these impacts, mitigation measures will be implemented. These include using water sprays to control dust and employing clean, well-maintained equipment to reduce air emissions. Silt fences or other sediment control measures will be installed to protect water quality, and stormwater management plans will be put in place. Fences will be installed around wetlands or other sensitive environmental resources to prevent damage. A materials management plan will detail hazardous materials and waste management protocols to protect the public, workers, and the environment.
Traffic management during construction will involve developing and communicating traffic management plans, minimizing lane closures during peak travel times, establishing safe and well-signed work zones, and providing temporary access or detours when necessary. A comprehensive public information plan will inform residents, businesses, and travelers about disruptions. Additional measures will be developed in response to identified impacts. CDOT is actively engaging with community members, service providers, and other organizations to understand impacts and create effective mitigation strategies.
Social and economic conditions are being analyzed for the I-270 community study area in the EIS. In addition, Colorado Senate Bill (SB) 21-260, Sustainability of the Transportation System, includes state requirements for identifying and coordinating with communities identified as Disproportionately Impacted, which includes much of the I-270 community study area.
Air quality in the EIS is being completed per the Clean Air Act and EPA’s transportation conformity rule, which analyzes criteria pollutants, priority pollutants of concern from transportation activities, and fugitive dust emissions. In addition, SB 21-260 also requires air quality modeling, monitoring, and mitigation beyond what is required in the EIS. Air quality analysis under SB 21-260 also includes a quantitative analysis of particulate matter, carbon monoxide, greenhouse gases, and climate.
The best ways to stay informed are to:
- Visit the project main webpage at codot.gov/projects/i270corridor
- Send us an email at [email protected]
- Sign up for text alerts by texting I270PROJECT (one word) to 21000. For text alerts in Spanish, sign up by texting PROYECTO270 to 21000.
- Call the project hotline at 720-743-7653
- Subscribe to the project email list to receive project updates and information about public meetings
Public information will continue as the project enters construction with a variety of communication measures to ensure the community is informed early and often. Regularly shared multilingual updates via construction notices, monthly newsletters, the project website, fact sheets, Nextdoor, project email, hotline and public meetings will be used. The Stakeholder Working Group that was established during the environmental study will also continue to meet.
The initial dirt or earthwork around the eight bridges between the York Street and Vasquez Boulevard interchanges will begin fall 2026. Reconstruction of these bridges will start in spring 2027.
While these bridges are being rebuilt, we will continue advancing the design for the reconstruction of the I-270 mainline, scheduled to begin in 2028. The final phase of work will include rebuilding the Vasquez Boulevard bridge over Sand Creek, building a new bicycle and pedestrian bridge over I-270 and improving the Sand Creek Drive frontage road.
The entire project is expected to take about five to six years to complete.
