Transportation Engineering

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Connecting People, Places, and Possibilities

At Diamond Engineering & Consulting Group, our Transportation Engineering Division is dedicated to designing, improving, and sustaining the infrastructure that moves our communities forward.

From local roadway enhancements to multimodal transportation networks, we deliver safe, efficient, and sustainable transportation solutions that balance mobility, accessibility, and environmental stewardship. Our engineers work closely with state, county, and municipal agencies as well as private developers to ensure each project advances connectivity, supports growth, and enhances public safety.

Our Services

Roadway & Highway Engineering

• Planning, design, and rehabilitation of highways, arterials, and local roadways.
• Horizontal and vertical alignment, geometric design, and grading optimization.
• Intersection design, roundabouts, and corridor improvement studies.
• Pavement design and management systems for new and existing facilities.
• Safety audits, traffic calming, and pedestrian/bicycle infrastructure integration.
• Compliance with AASHTO Green Book, MUTCD, and local DOT standards.

Traffic Engineering & Transportation Planning

• Traffic impact studies, capacity analysis, and Level of Service (LOS) evaluations.
• Signal design, phasing, timing plans, and Intelligent Transportation Systems (ITS).
• Corridor management and access control planning.
• Parking demand and circulation analysis for commercial and municipal developments.
• Multimodal and complete-street design incorporating bicycles, pedestrians, and transit.
• Coordination with NJDOT, NYSDOT, PennDOT, and ConnDOT for regional planning.

Railroad & Transit Systems

• Design of railway infrastructure, yards, sidings, and maintenance-of-way facilities.
• Structural coordination for rail bridges, retaining walls, and support systems.
• Track alignment and turnout layout design.
• Signaling, communication, and traction power coordination with electrical systems.
• Design for transit-oriented developments (TODs) and intermodal connectivity.
• Compliance with FRA and FTA design and safety standards.

Airport & Aviation Facilities

• Airfield geometry design including taxiways, aprons, and service roads.
• Stormwater and drainage systems for airfield and landside facilities.
• Airfield lighting and electrical infrastructure coordination.
• Airport terminal site planning, access, and parking design.
• Noise mitigation and environmental compliance for FAA Part 150 requirements.
• Utility relocation and infrastructure support for terminal expansions and upgrades.

Bridge & Transportation Structures

• Design and rehabilitation of vehicular, pedestrian, and rail bridges.
• Retaining walls, abutments, culverts, and overhead sign structures.
• Load ratings, inspections, and asset management documentation.
• Integration of structural, civil, and geotechnical systems for long-term durability.
• Coordination with FHWA and local transportation agencies.

Utilities, Transmission & Distribution Coordination

• Relocation and protection design for underground and overhead utilities during roadway, bridge, or transit projects.
• Design of transmission and distribution structures associated with major infrastructure corridors.
• Coordination with electrical, telecommunication, water, and gas utilities to minimize service disruptions.

Ports, Marine & Intermodal Facilities

• Design of port access roads, loading areas, and marine terminal infrastructure.
• Integration of freight rail, truck, and vessel transport systems for logistical efficiency.
• Pavement and drainage systems for container yards and storage facilities.
• Coordination with Port Authorities and Maritime Agencies to meet international logistics standards.

Transportation Systems Management & Operations (TSMO)

• Development of ITS, real-time monitoring, and adaptive control systems.
• Smart corridor planning with communication and data integration for efficiency.
• Traffic data collection and predictive modeling for network optimization.
• System maintenance planning to extend asset life and improve reliability.

Markets We Serve

• State & Local Transportation Agencies
• Railroad and Transit Authorities
• Airports & Aviation Facilities
• Ports & Marine Terminals
• Commercial & Industrial Developments
• Municipal Public Works Departments
• Utility Companies and Infrastructure Providers
• Government Agencies and Public Infrastructure Projects

Codes, Standards & Regulatory Compliance

Diamond’s Transportation Engineering team delivers projects that comply with all applicable local, state, and federal design and safety requirements, including:

• AASHTO, FHWA, FRA, FTA, FAA, and MUTCD standards.
• ADA accessibility and complete-streets design guidelines.
• State DOT design manuals (NYSDOT, NJDOT, ConnDOT, PennDOT).
• USACE and EPA regulations for environmental and stormwater management.
• NEPA/SEQRA environmental documentation and permitting coordination.

Technology & Design Tools

• BIM and 3D corridor modeling using Civil 3D, OpenRoads, and InfraWorks.
• Traffic simulation and capacity analysis using Synchro, VISSIM, and HCS.
• GIS mapping and asset management for spatial analysis and maintenance planning.
• Hydrologic and hydraulic modeling for roadway and bridge drainage systems.
• Survey and LiDAR integration for accuracy and efficiency during design.

Safety, Quality & Sustainability

Every transportation design at Diamond is built on a foundation of safety, reliability, and sustainability.
We implement Vision Zero principles to eliminate traffic fatalities and severe injuries, while promoting sustainable modes of travel.

Our ISO 9001–aligned Quality Management System ensures consistency, constructability, and accuracy at every phase — from concept development to construction administration.

Sustainability & Resilience

Diamond integrates environmental responsibility into transportation infrastructure by:

• Designing for resilient roadways and bridges to withstand extreme weather.
• Implementing low-impact development (LID) and green stormwater solutions.
• Incorporating smart transportation technologies that reduce congestion and emissions.
• Supporting electric vehicle (EV) infrastructure and multimodal connectivity.
• Promoting materials and methods that reduce lifecycle costs and carbon impact.

Our Deliverables

• Transportation and traffic studies
• Roadway and bridge design drawings
• Pavement and drainage design reports
• Signal, signage, and striping plans
• Utility coordination and relocation design packages
• Cost estimates, bid specifications, and scheduling documents
• Environmental and permitting documentation
• Construction support and field inspection reports

Why Diamond

• Multidisciplinary Expertise – integrated civil, structural, and electrical design for complex infrastructure projects.
• Regional Experience – proven relationships with DOTs, municipalities, and regulatory agencies in NY, NJ, CT, and PA.
• Safety & Sustainability Commitment – designs that prioritize community wellbeing and long-term resilience.
• Innovative Solutions – advanced modeling, smart systems, and sustainable mobility strategies.
• Client Partnership – dedicated project teams providing responsive service from concept through construction.

Moving Communities Forward

From highways and bridges to rail corridors and aviation facilities, Diamond Engineering & Consulting Group provides transportation engineering solutions that connect people, strengthen economies, and shape the future of mobility.

Contact us today to learn how our Transportation Engineering Division can help move your project and your community forward.