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State Departments of Transportation

Enhance your project’s safety, mobility and resilience with a partner who puts your goals first. With CDM Smith, you gain expert guidance, innovative solutions and a team dedicated to your agency’s success at every step.

Market Lead

Jenny Humphreys

Driving the full project lifecycle

Aerial view of a busy highway intersection surrounded by residential buildings and greenery under a cloudy sky.

Two construction workers in safety vests and helmets stand near a bridge with equipment in the background.

Two people in high visibility vests examine a detailed construction map on a wall labeled 'MOT Phase 1: Segment 1.'

From planning and transportation revenue analyses to policy and prioritization consulting, CDM Smith supports state DOTs across the country.

Transportation planning & design

Preparing documentation and alternatives analyses, including Environmental Impact Statements, with design support in roadway, bridge and hydraulics.

Construction engineering & inspection

Going beyond traditional inspections to provide project oversight, quality control, scheduling and management services.

Traffic safety, planning & design

Providing critical insights with travel demand modeling, traffic and revenue
modeling, traffic simulation and operational modeling.

Complete Streets

Integrating traffic, public engagement and roadway design to improve mobility and safety on roadways.

Featured DOT projects

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Boston, Massachusetts

Converting the Mass Pike to electronic tolling

We helped MassDOT deliver America’s largest, most complex all-electronic tolling system.

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Aerial view of a highway interchange with overpass and surrounding greenery.

Tifton District, Georgia

20 years of roadway revolution with GDOT

We've partnered with the Georgia Department of Transportation to improve infrastructure in the state for over 20 years, delivering roads and bridges valued at over $3 billion.

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Aerial view of I-95 construction, with vehicles on lanes, industrial area to the left, and city skyline in the distance.

Philadelphia, Pennsylvania

Reviving mobility on I-95 in Philadelphia

For over a decade, PennDOT has been working to redesign one of its busiest highway segments to improve safety, access and community connectivity.

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Seattle, Washington

Tolling keeps Washington bridge afloat

Toll financing enabled the Washington State Department of Transportation (WSDOT) to replace Seattle’s aging SR 520 floating bridge, ensuring safety and multimodal access.

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Illustration of a woman thinking next to a charging electric car, with question marks above her head.

How should electric vehicles pay for road usage charging?

Road usage charging (RUC) offers a solution, but the issue naturally brings up the topic of fairness. So, we asked the experts to weigh in and answer this question: How should EVs pay for road usage?

Read the Insight

Person in a navy blazer and white shirt standing outdoors by trees.

I aim for economically sound designs that improve mobility and respect the environment and character of each community we serve.

Jenny Humphreys, AICP

Senior Transportation Planner

Jenny has two decades of experience leading and coordinating engineering, traffic, water, environmental, and planning teams. She balances mobility, funding and environmental needs to support communities.

Related practices

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 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.

Construction Management

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

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.

Program Management

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

Toll and Revenue

We are helping support the shift from traditional fuel tax revenue sources to more sustainable user-based fees. Our revenue forecasts have supported more than $150 billion in critical transportation improvements across the world.

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.

Water Resources Infrastructure and Resiliency

Forward-thinking water resources planning, design construction and operations means making smarter investments that lower life-cycle costs and provide multiple benefits.

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.

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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