Engineering Impact, Delivering Results

Comprehensive Services for Stronger, Smarter Communities

At PSI, we provide a full range of civil and transportation engineering services that support sustainable growth, safer mobility, and resilient infrastructure. From planning and design to construction and asset management, our work is grounded in innovation, collaboration, and community impact.

Projects

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11th Street NW Bus Priority Project | Transit, Bike & Pedestrian Improvements in Washington, DC

Roadway Design

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14th Street NW Streetscape & Safety Improvements | Corridor Rehabilitation from Thomas Circle to Florida Avenue

Roadway Design

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Arizona Crash Information System (ACIS) Enhancements | Faster, Smarter Crash Data Analysis

Software Development

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Citywide Guardrail & Attenuator Inspection Services | DDOT Roadway Safety Program

Asset Management

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Citywide Traffic Engineering Design Services | On-Call Support Across Washington, DC

Traffic Engineering

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DC PLUG Utility Design | Power Line Undergrounding for Grid Resilience

Subsurface Utility Engineering (SUE)

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DC Pavement Marking Retroreflectivity & Asset Management | Lifecycle Planning Across 2,100 Lane-Miles

Asset Management

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DC Pedestrian Asset Inventory & ADA Compliance | Citywide Accessibility Assessment for DDOT

Asset Management

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DC Standard Engineering Manuals Update | Transportation Design & Construction Guidelines

Construction Management and Inspection

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DC Water Potomac River Tunnel – Civil Design for CSO Control

Subsurface Utility Engineering (SUE)

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Embassy Row Streetscape Design in Washington, DC | Massachusetts Avenue NW Roadway Rehabilitation

Roadway Design

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I-495 Express Lanes Northern Extension (495 NEXT) | Traffic Engineering, Utility Coordination & Construction Support in Northern Virginia

Traffic Engineering

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Kennedy Street NW Streetscape & Infrastructure Design | Washington, DC Corridor Rehabilitation

Roadway Design

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NCHRP: Enhancing Traffic Signal Management with ATSPM and Smart Infrastructure

Research and Emerging Technologies

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North Capitol Street Corridor Study – Phase II | Multimodal Transportation & Safety Planning in Washington, DC

Transportation Planning

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Subsurface Utility Engineering (SUE) & Multimodal Design – Aspen Street & Wheeler Road, DC

Subsurface Utility Engineering (SUE)

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Swampoodle Terrace Park Construction Inspection | Green Space Delivery in NoMa, DC

Construction Management and Inspection

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TARAS2 Traffic Crash Analysis & Reporting Software | Automated Safety Recommendations for Planners & Engineers

Software Development

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Traffic Safety Construction Management for DDOT | Bus, Bike, and Pedestrian Infrastructure

Construction Management and Inspection

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Traffic Safety Input (TSI) Prioritization Model | Data-Driven Tool Supporting Vision Zero in Washington, DC

Transportation Planning

Research and Emerging Technologies

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Union Station & Columbus Circle Traffic Signal and Lighting Redesign | Washington, DC

Transportation Planning

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VDOT I-95 Express Lanes & Opitz Boulevard Ramp | Traffic Engineering & Field Support in Prince William County, VA

Traffic Engineering

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Vision Zero TSI Prioritization Model | Data-Driven Traffic Safety Planning for DDOT

Software Development

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Ready to Transform Your Community?

We’re passionate about building smart, resilient communities through innovation and expertise. Let’s discuss how PSI can tailor solutions for your community’s unique transportation challenges.