highway + roadway engineering
our expertise
Toll authorities, local agencies, and state departments of transportation across the nation count on Patrick for cost-effective transportation infrastructure services from initial planning through construction close-out. Our services include the planning and design of roads, highways, bridges, and interchanges in rural, urban, and mass transit environments. Patrick understands that meeting community objectives, adhering to required standards, and improving safety are key concerns of any transportation project. By partnering with our clients to design projects that are right-sized for current and future needs, and with laser focus on quality, safety, and lifecycle costs, Patrick provides our clients with comprehensive solutions that stand the test of time.
our disciplines
Corridor Studies + NEPA Documentation
Traffic + Transportation Planning
Preliminary Engineering + Feasibility Studies (Alternatives Analysis)
Traffic Engineering + Studies
Intersection + Roadway Design
Highway + Interchange Design
Drainage Design + Permitting
Maintenance of Traffic + Construction Sequencing
Public Involvement
Constructability + Value Engineering
Pedestrian Trail Planning + Design
Context Sensitive Solutions (CSS)
Funding Applications
Project + Program Management
Owner’s Representative Services
Scheduling, Estimating + Risk Management
our projects
Illinois Tollway | Veterans Memorial Tollway (I-355) Rehabilitation
The Veterans Memorial Tollway (I-355) is a major north-south tollway in central DuPage County, carrying approximately 268,000 vehicles per day. Furthering its commitment to timely maintenance of roadways and bridges, the Illinois Tollway selected Patrick to inspect and develop rehabilitation plans for I-355 between Butterfield Road and Army Trail Road, a distance of approximately 7.5 miles. One major design challenge was how best to maintain traffic without causing congestion and delays for daily commuters. To maintain operations, Patrick developed traffic shifts and work zone configurations allowing the Tollway to maintain all lanes during peak travel times. As part of this project, Patrick inspected and designed 25 bridges (including one railroad bridge over I-355), retaining walls, and overhead cantilever sign structures within this corridor. Lighting, drainage, and noise abatement wall upgrades were also included. Under an accelerated design schedule, Patrick delivered project design a year early to meet the Illinois Tollway’s needs.