Transit Agencies

Transit Agencies | CDM Smith

Driving transit forward

Brightly colored bus with sun graphic at a station, people entering.

People in a meeting room, sitting at a white table with documents and a smartphone.

A train at a transit station beside a highway under a clear blue sky.

Working with transit agencies to plan, design and upgrade the systems that keep cities moving. From BRT corridors and intermodal hubs to facility improvements, we deliver resilient, accessible solutions that improve operations and support cleaner energy fleets.

Construction phasing

Coordinating closely with operations teams to minimize disruptions, maintain service reliability and keep riders moving safely during every stage of the project.

Facility upgrades and modernization

Upgrading and modernizing bus garages, rail shops, and other non-revenue facilities to maintain fleet readiness, extend asset life and deliver dependable service every day.

System accessibility for all

Enhancing station access through new elevators, pathways and ADA-compliant solutions that create safer, more inclusive mobility for all riders.

Fleet resiliency with clean energy

Supporting fleet transitions to zero-emission buses with facility upgrades, charging systems and resilient power strategies that prepare agencies for a cleaner energy future.

Trusted by agencies, backed by results

$10B

and counting of transit infrastructure delivered worldwide

9

of the top 10 largest U.S. agencies are served by our team

18

of the top 25 rail agencies nationwide trust us

20+

states we're delivering modern transit projects in

Featured transit agency projects

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Rendering of CTA Red Line Michigan Station with elevated platform, bright red stairways, plaza, and surrounding park.

Chicago, Illinois

Extending Chicago’s Red Line to close transit gaps

The CTA’s Red Line Extension will bring fast, reliable transit to Chicago’s Far South Side, improving access, mobility and economic opportunity.

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A group of people getting on a bright light blue bus called “SunRunner” in Tampa, Florida

St. Petersburg, Florida

SunRunner: a ride the whole community owns

A novel bus rapid transit (BRT) system in Florida combines artistic stations, dedicated lanes, and Complete Corridors elements to revamp the roadway right-of-way.

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The back view of a purple MARTA Rapid bus parked on a street near a Thai restaurant, with pedestrians nearby at a station.

Atlanta, Georgia

Planning high-capacity transit on Atlanta’s I-285

CDM Smith is helping regional partners evaluate bus rapid transit (BRT) on I-285, advancing equitable, reliable mobility for one of metro Atlanta’s most congested corridors.

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Sound Transit train at station with passengers boarding.

Kent and Auburn, Washington

Strengthening access to Seattle’s rail stations

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Person in a suit and blue shirt stands indoors with abstract red art in background.

Transit agencies rely on partners who understand their operational reality. Our job is to strengthen that mission—keeping riders moving, modernizing aging systems and delivering solutions that enhance reliability for years to come.

Chris Martel, PE, BCEE

Chris is an environmental engineer specializing in solid and hazardous waste management, facility design, landfill gas systems, audits and compliance.

Related practices

Architecture

Our architects and engineers deliver quality solutions that master function, efficiency, cost-effectiveness and aesthetics.

Program Management

CDM Smith’s program management team is bringing complexity under control by building strong, enduring relationships.

Automation

We assist clients around the world with all phases of instrumentation, process control and automation, delivering high-quality solutions that exceed expectations but not budgets.

Transit & Urban Mobility

We connect people and technology to build and modernize sustainable transportation infrastructure for the future, maximizing stakeholder funding and fueling long-term economic growth.

Climate Resilience

We can no longer rely on the past to prepare for the future. Our teams work across water, transportation, environment and infrastructure to implement right-size solutions backed by climate science.

Transportation CEI

Our construction engineering and inspection (CEI) services are essential to delivering transportation projects built to the highest standards of quality, safety and compliance.

Construction Management

CDM Smith provides full-service construction management solutions across the water, environmental, transportation, energy and facilities industries.

Transportation Design

Our experts are versed in various disciplines, including roadway and structure design, traffic and safety, intelligent transportation systems (ITS), public transit and climate resilient infrastructure.

Mechanical, Electrical, and Plumbing & Fire Protection (MEP+FP)

We’ve completed hundreds of projects from planning and design to system start-up and commissioning, involving boilers, chillers, heating, ventilation, and air conditioning (HVAC), primary and secondary distribution, substations, power generation, cogeneration and sustainable/renewable energy systems.

Transportation Planning

Our global transportation planning practice is founded on balanced, integrated and forward-thinking mobility solutions. Leading with a data-driven approach, we deliver hundreds of plans to private and public clients.

Ready to take the next steps?

We love collaborating with passionate individuals and organizations. If you want to talk about potential projects, reach out to our experts. If you're interested in joining our team, check our careers page for open positions or internships.

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