- BMW Group Consulting
- Provides consulting and business help on aggregate, asphalt, portland stone, and concrete.
- Columbus Engineering Consultants, Inc.
- Specializing in civil engineering in the fields of freeway and highway, bridge and structure, street, storm and sanitary sewers, site engineering, utility lines, surveying and right-of-way.
- E. C. Driver & Associates, Inc.
- Offering structural engineering, heavy machinery, control systems and fluid power systems.
- Ground Engineering Consultants
- Provides consulting engineering services in the areas of geotechnical engineering, construction engineering and materials testing, steel and weld inspection and testing, laboratory testing, environmental engineering, construction management.
- Image Sensing Systems, Inc.
- Specializing in software based detection solutions for the intelligent transportation systems (ITS) sector and adjacent overlapping markets.
- KMB International
- Provides project management, consulting, and owners representative services to airports, private, municipal aviation facilities.
- Trafficware Ltd.
- Develops and markets software for transportation engineers.
- Transit Engineering Services
- Provides engineering support in the design, manufacture and modification of rail and transit vehicles.
- Volkert & Associates, Inc.
- Offering engineering, environmental, program management, and construction services.
- Wells and Associates
- Offering traffic engineering and transportation planning.
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