Complete Corridors

Complete Corridors provide a variety of travel choices and use technology to manage how highways and major roads are used in real time. They provide a balance of dedicated, safe space for everyone, including freight vehicles and people who walk, bike, drive, ride transit, and use Flexible Fleets.
Download an informational flier about Complete Corridors (English | Español).
View the 5 Big Moves glossary of terms (English | Español). 
SANDAG is planning for a regional network of Complete Corridors on major roads and highways. The proposed network intertwines with the adopted regional bike network to create seamless connections within communities and across jurisdictions. Complete Corridors create a backbone for Flexible Fleets and Transit Leap services by combining infrastructure and technology solutions. The Next OS would unify Complete Corridor management systems and complement the proposed infrastructure improvements to let people choose the travel option that works best for them.
Learn more about developing the Complete Corridors network

What are some key features of Complete Corridors? 

  • Managed Lanes
    Managed Lanes, such as those along the Interstate 15 corridor, offer priority access to people using transit, carpooling, or vanpooling. People driving alone can access these lanes for a fee. When paired with technology, this can help move more people, reduce traffic congestion, and increase transit ridership. 

  • Active Transportation and Demand Management (ATDM)
    Technology enables transportation operators to modify how infrastructure and services are used based on changing traffic conditions. This also allows operators to make more use of existing roads and offers an alternative to costly road expansion. Real-time travel information helps people decide how, where, and when to travel to avoid congestion and dangerous driving conditions. 

  • Smart infrastructure and connected vehicles
    High-speed communication networks allow connected vehicles, smartphones, and smart roads to share data, which can help reduce collisions, increase network capacity, and improve travel times. 

  • Priority for transit, active transportation, and shared mobility services
    Smart intersections, dedicated transit and micromobility lanes, and separate space for people who walk and bike make these ways of traveling safer, faster, and more comfortable. More people choosing shared transportation options leads to better air quality. According to a Federal Highway Administration report, installing protected bike lanes can reduce crashes by up to 50%. 

  • Curb management
    Curb space can be managed to accommodate different uses based on levels of traffic at varying times of the day. This can lead to fewer traffic jams and idling, improve safety, and help meet economic and sustainability goals. 

  • Electric Vehicle (EV) infrastructure
    Public charging and hydrogen fueling stations help support California's shift to electric vehicles and a reduction of greenhouse gases. 

Complete Corridors

What are industry experts saying about Complete Corridors? 

On June 26, 2019, SANDAG hosted a webinar about features and anticipated benefits of Complete Corridors with industry experts Ben Sumers from McKinsey & Company and Jonathon Hart from CDM Smith. View the webinar recording and explore how technology, policy, and connected infrastructure can lead to less highway congestion while continuing to grow as a region. Closed captions are available in English and Spanish.

View responses to Frequently Asked Questions (FAQs) from this webinar and learn more about the 5 Big Moves webinar series.

How have other regions benefited from Complete Corridors features? 

  • Oregon’s 217 Active Traffic Management (ATM) project resulted in 7% reduction in average travel time, and travel time reliability improved by 50% while traffic volumes increased 9%.
  • Collisions on Interstate 5 in Washington State decreased 65 to 75% along a 7.5-mile corridor where an ATM system was deployed.
  • In Austin, Texas, use of ATDM strategies and variable speed limits resulted in 17% reduction in air pollution.