- Transurban CityLink
Specializes in the development and operation of advanced electronic toll roads. Developer of CityLink and the e-TAG device.
- David Volkert & Associates, Inc.
Providing bridge and roadway design, airports, utilities, seaports, education, and health facilities.
- Image Sensing Systems
Company behind Autoscope, also known as image processing or artificial vision, a technology that combines video imaging with computerized pattern recognition.
Specializes in software that is used for modeling and designing transportation systems.
- Kittelson & Associates, Inc.
Specializes in Transportation Planning and Traffic Engineering. Provides transportation operations, planning, and research services to gov't and private orgs.
- DKS Associates
Transportation engineering consulting services for ground transportation.
- MINCAD Systems
Developer of design packages for highway, airport, and intermodal pavements.
- Traffic Design Group
Specialist transportation and traffic engineering consultancy. Active in New Zealand, the South Pacific and South-East Asia.
- Transit Engineering Services
Offers test equipment, engineering, and systems for transit vehicles.
- Transit Performance Engineering: Vehicle Structural Analysis
Offers consulting services in public transit engineering and management, preparation of technical specifications, and more.
- Tinter Associates, Inc.
Specializing in traffic signal design, traffic impact studies, concurrency evaluations, and condemnation analyses.
- E.C. Driver & Associates
Conception, project management and design engineering for roadway, bridge and bascule (movable) bridges.
- Whitworth-Borta and Co.
Engineering company specializing in airport design and construction projects from planning and paving to lighting.
- Rekola Engineers and Surveyors, Inc.
Clients include private developers, realtors, regional shortlines, and more.