Transportation engineering in Connecticut focuses on developing and maintaining efficient transit systems. This crucial industry encompasses firms that tackle everything from roadway design to traffic management. Many companies collaborate with state agencies on infrastructure upgrades, ensuring public safety and effective mobility. There’s a growing demand for sustainable solutions and innovative technologies, especially given increased traffic and environmental challenges. As cities expand, the need for integrated transportation engineering becomes more pressing, with firms now emphasizing green options and digital tools to enhance project outcomes.


The companies featured in this list vary in size, with employee counts ranging from small, specialized firms to larger established players. Most are based in central locations like Hartford and Meriden, while others serve nationwide clienteles. Founded between the 1940s and early 2000s, these companies specialize in key areas including traffic studies, bridge design, and environmental consulting. Their array of services meets both municipal needs and commercial demands, reflecting the growing complexity within the transportation engineering sector.


Continue reading to explore Connecticut's top transportation engineering firms.


Top 22 Transportation Engineering Companies in Connecticut


1. VN Engineers, Inc.

  • Website: vnengineers.com
  • Ownership type: Private
  • Headquarters: North Haven, Connecticut, United States (USA)
  • Employee distribution: United States (USA) 96%, India 4%
  • Founded year: 1983
  • Headcount: 51-200
  • LinkedIn: vnengineers

VN Engineers, Inc. is a civil engineering consulting firm based in North Haven, Connecticut, specializing in transportation and infrastructure projects. Established in 1983, the company has built a reputation for providing comprehensive services that include design-build, transportation planning, traffic engineering, and construction inspection. With a workforce of approximately 70 employees, VN Engineers has successfully contributed to various projects across several states, including Connecticut, New York, Florida, and Virginia. Their expertise extends to areas such as signalization, road and bike planning, and utility coordination, showcasing their commitment to enhancing mobility and safety in transportation. The firm has also received recognition for its work, including awards from the American Society of Civil Engineers (ASCE). As a women-owned business, VN Engineers, Inc. emphasizes diversity and inclusion in its operations, further solidifying its role in the engineering community.


2. GM2 Associates, Inc.

  • Website: gm2inc.com
  • Ownership type: Corporate
  • Headquarters: Glastonbury, Connecticut, United States (USA)
  • Employee distribution: United States (USA) 97%, Other 3%
  • Latest funding: August 2021
  • Founded year: 1988
  • Headcount: 51-200
  • LinkedIn: gm2-associates-inc

GM2 Associates, Inc. is an engineering and construction firm based in Glastonbury, Connecticut, with a workforce of approximately 177 employees. Established in 1988, GM2 provides a wide array of services, including engineering solutions, construction inspection, and surveying. The company serves a diverse clientele, including municipalities and private developers, focusing on infrastructure projects across multiple sectors such as transportation, energy, and municipal services. GM2's transportation division is particularly noteworthy, as it specializes in bridge engineering, highway design, and traffic engineering. Their team has completed extensive work in bridge inspections and has been involved in significant projects that enhance transportation infrastructure. GM2's commitment to excellence and community engagement further underscores their role in shaping effective and sustainable engineering solutions.


3. AI Engineers, Inc.

  • Website: aiengineers.com
  • Ownership type: Venture Capital
  • Headquarters: Middletown, Connecticut, United States (USA)
  • Employee distribution: United States (USA) 83%, Pakistan 17%
  • Latest funding: $29.5M, November 2018
  • Founded year: 1991
  • Headcount: 201-500
  • LinkedIn: ai-engineers-inc

AI Engineers, Inc. is an engineering firm based in Middletown, Connecticut, founded in 1991. With a workforce of approximately 369 employees, the company operates under a venture capital ownership model. AI Engineers specializes in a variety of engineering services, including bridge design, transportation engineering, and water/wastewater management. They cater to both government agencies and private sector clients, focusing on infrastructure development and construction management. The firm has been involved in numerous notable projects, such as the MTA C&D Facility upgrades in New York and the SCDOT Bridge Load Rating & Evaluation Engineering in South Carolina. In 2018, AI Engineers secured $29.5 million in funding, which underscores their growth potential and commitment to advancing their engineering capabilities.


4. Freeman Companies, LLC

  • Website: freemancos.com
  • Ownership type: Private
  • Headquarters: Hartford, Connecticut, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2009
  • Headcount: 11-50
  • LinkedIn: freeman-companies-llc

Freeman Companies, LLC, founded in 2009 and based in Hartford, Connecticut, is a private engineering firm that specializes in a variety of professional services. The company focuses on civil engineering, landscape architecture, geotechnical engineering, environmental sciences, and notably, traffic and transportation engineering. They serve a range of clients, including governmental, institutional, and private sector entities, providing tailored solutions to complex engineering and environmental challenges. Freeman Companies is committed to sustainability and excellence, emphasizing innovative practices in their projects. Their transportation engineering services include traffic impact studies, signal design, roadway planning, and transit system analysis, showcasing their active involvement in enhancing transportation systems. The firm is also recognized for its social responsibility initiatives, including educational scholarships aimed at supporting minority students pursuing engineering careers. Freeman Companies is fully licensed in jurisdictions throughout New England and holds various certifications, including MBE, DBE, and SBA 8(a).


5. Garg Consulting Services, Inc.


Garg Consulting Services, Inc., based in Rocky Hill, Connecticut, is a private engineering firm founded in 1990. With a workforce of approximately 96 employees, the company specializes in a wide array of engineering services, including structural, civil, rail, and transit engineering, as well as construction management and inspection. Garg Consulting has built a strong portfolio of projects, particularly in the Northeastern United States, serving federal and state agencies. Their work includes significant infrastructure projects aimed at enhancing safety and compliance, such as the design-build services for accessibility upgrades at multiple New York City stations and various safety improvements along I-95. The firm is also recognized for its commitment to quality and client satisfaction, striving to deliver innovative and cost-effective engineering solutions. Their certifications as DBE/MBE/SBE further highlight their dedication to fostering diversity within the engineering community.


6. Cardinal Engineering Associates, Inc.


Cardinal Engineering Associates, Inc. is a civil engineering firm based in Meriden, Connecticut, with a history dating back to 1962. The company provides a broad spectrum of engineering services, primarily to municipalities across Connecticut. Their expertise lies in transportation engineering, stormwater and wastewater management, construction engineering, and surveying. Cardinal Engineering has a dedicated team of licensed civil engineers and surveyors, many of whom have over 25 years of experience in the field. They have successfully completed numerous projects, including highway design, bridge evaluations, and traffic engineering, demonstrating their capability in managing complex infrastructure projects. The firm is also a certified Small Business Enterprise (SBE) in Connecticut, which highlights their commitment to local engagement and service. Their focus on open communication and responsive service has earned them a solid reputation among public agencies, making them a reliable partner in infrastructure development.


7. Fuss & O'Neill

  • Website: fando.com
  • Ownership type: Private
  • Headquarters: Hartford, Connecticut, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1924
  • Headcount: 201-500
  • LinkedIn: fuss-%26-o%27neill

Fuss & O'Neill is an engineering firm based in Hartford, Connecticut, established in 1924. The company specializes in civil and environmental engineering services, providing a broad array of solutions to businesses and organizations. Their offerings include site planning, climate resilience, and water management, which help clients navigate complex engineering challenges and regulatory requirements. Notably, Fuss & O'Neill has a dedicated transportation and traffic engineering division that focuses on projects such as highway design, traffic engineering, and the development of complete streets. Their commitment to sustainability is evident in their approach to transportation, where they integrate modern practices like greenways and multi-use trails into their designs. With a workforce of approximately 458 employees, the firm is well-equipped to handle a variety of projects across different sectors, including transportation, water, and environmental engineering.


8. Luchs Consulting Engineers|DeCarlo & Doll Architects

  • Website: luchs.com
  • Ownership type: Private
  • Headquarters: Meriden, Connecticut, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1948
  • Headcount: 11-50
  • LinkedIn: luchs-consulting-engineers-llc

Luchs Consulting Engineers|DeCarlo & Doll Architects is a private engineering and architectural consulting firm based in Meriden, Connecticut. Founded in 1948, the company has built a reputation for providing a wide range of services, including civil engineering, traffic engineering, and construction inspection. They primarily serve municipalities and utility providers in Connecticut, assisting with infrastructure projects and ensuring compliance with regulatory standards. The firm has a strong focus on transportation engineering, with expertise in areas such as highway design, traffic management, and safety planning. Their portfolio includes significant projects like the Interstate I-91 Bradley Airport Connector and various local road improvements. Luchs Consulting Engineers has also received accolades for their client service, demonstrating their commitment to quality and responsiveness in project delivery.


9. Solli Engineering

  • Website: solliengineering.com
  • Ownership type: Private
  • Headquarters: Monroe, Connecticut, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2012
  • Headcount: 11-50
  • LinkedIn: solli-engineering-llc

Solli Engineering, LLC, founded in 2012 and based in Monroe, Connecticut, is a private engineering firm that provides a wide range of civil engineering and land development consulting services. With a team of approximately 30 employees, the firm serves both public and private clients throughout the northeastern United States. Their expertise spans several areas, including site design, geotechnical solutions, traffic engineering, surveying, and permitting. Solli Engineering prides itself on delivering practical solutions that meet regulatory requirements and project goals, ensuring successful project execution. The firm has a notable focus on traffic and transportation engineering, where they conduct traffic impact studies, design traffic signals, and perform roadway design, among other services. Their portfolio includes a variety of projects across commercial, residential, and industrial sectors, showcasing their ability to handle complex engineering challenges. Solli Engineering is committed to maintaining strong communication with all project stakeholders, which is essential for the successful completion of transportation projects.


10. WMC Consulting Engineers

  • Website: wmcengineers.com
  • Ownership type: Private
  • Headquarters: Newington, Connecticut, United States (USA)
  • Employee distribution: United States (USA) 83%, Philippines 8%, Serbia 8%
  • Founded year: 1988
  • Headcount: 11-50
  • LinkedIn: wmc-consulting-engineers

WMC Consulting Engineers, founded in 1988 and based in Newington, Connecticut, is a private consulting engineering firm that specializes in civil engineering and infrastructure projects. With a team of approximately 36 employees, the firm has built a solid reputation for its technical expertise and commitment to community relations. WMC provides a comprehensive range of services, including planning, design, and construction management, primarily serving municipalities, state agencies, and private clients in Connecticut and western Massachusetts. Their project portfolio includes significant transportation-related work, such as roadway and bridge design, traffic studies, and construction management for various infrastructure projects. WMC has successfully completed over 120 projects for Connecticut municipalities and state agencies, demonstrating their capability and reliability in the transportation engineering sector. The firm is recognized for its innovative approach, utilizing the latest technology to deliver cost-effective and efficient solutions. WMC's dedication to quality and client satisfaction is evident in their consistent project completion on time and within budget, making them a respected entity in the engineering community.


11. Design Professionals, Inc.


Design Professionals, Inc. is a professional services firm based in South Windsor, Connecticut, specializing in civil engineering, land surveying, and landscape architecture. Founded in 1986, the company has built a solid reputation by serving both private and public sector clients. They offer comprehensive site design services, which include traffic engineering, a crucial aspect of transportation engineering. With a team of experienced civil and traffic engineers, they handle projects ranging from retail and commercial developments to roadways and educational facilities. The firm has participated in over 5,000 projects across more than 225 communities in New England, showcasing their extensive experience and commitment to quality service. They are also certified as a Small Business Enterprise (SBE) by the Connecticut Department of Administrative Services, further emphasizing their established role in the industry.


12. CCA Engineering

  • Website: ccaengineering.com
  • Ownership type: Corporate
  • Headquarters: Brookfield, Connecticut, United States (USA)
  • Employee distribution: United States (USA) 70%, China 15%, Malaysia 15%
  • Latest funding: July 2014
  • Founded year: 1978
  • Headcount: 11-50
  • LinkedIn: cca-engineering

CCA Engineering, established in 1977 and based in Brookfield, Connecticut, is a consulting engineering firm that specializes in civil engineering, environmental services, land surveying, and landscape architecture. The firm serves a variety of clients, including municipalities, industries, and private entities, helping them navigate regulatory compliance and design infrastructure projects. CCA Engineering has built a reputation for quality and innovation, particularly in civil engineering, where they provide services such as site plans, storm drainage, and roadway designs. Their surveying division is equipped with state-of-the-art technology, allowing them to deliver precise and efficient surveying services. CCA has worked on significant projects for the Connecticut Department of Transportation, showcasing their capability in transportation-related engineering. The firm prides itself on its core values of integrity, innovation, employee loyalty, and quality, which guide their operations and client relationships.


13. BL Companies

  • Website: blcompanies.com
  • Ownership type: Private
  • Headquarters: Meriden, Connecticut, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1986
  • Headcount: 201-500
  • LinkedIn: bl-companies

BL Companies, founded in 1986 and based in Meriden, Connecticut, is an employee-owned architecture and engineering firm. The company provides integrated services that include architecture, civil engineering, environmental consulting, land surveying, and transportation engineering. With a workforce of approximately 489 employees, BL Companies serves both public and private sector clients across various markets, including commercial, healthcare, and public infrastructure. Their commitment to client satisfaction is reflected in their collaborative approach and the expertise of their staff. The firm has been recognized as a Top 500 Design Firm by Engineering News Record, highlighting its significant presence in the industry. BL Companies emphasizes sustainability and community involvement, ensuring that their projects not only meet client needs but also contribute positively to the communities they serve.


14. Celtic Energy

  • Website: celticenergy.com
  • Ownership type: Corporate
  • Headquarters: Glastonbury, Connecticut, United States (USA)
  • Employee distribution: United States (USA) 69%, United Kingdom (UK) 31%
  • Latest funding: January 2019
  • Founded year: 2000
  • Headcount: 11-50
  • LinkedIn: celtic-energy-inc-

Celtic Energy, part of NV5, is a consulting and engineering firm based in Glastonbury, Connecticut. Founded in 2000, the company specializes in technology and conformity assessment solutions for both public and private sector clients. Their expertise spans infrastructure, utility, and building assets, with a strong emphasis on enhancing community resources and sustainability. NV5's services include planning, design, and construction management, particularly in areas such as transportation, water, and environmental projects. They leverage advanced technology to address modern infrastructure challenges, making significant contributions to projects that improve community livability. With a workforce of around 16 employees, they maintain a presence in both the United States and the United Kingdom, reflecting their commitment to addressing infrastructure needs across different regions.


15. Zuvic

  • Website: zuvic.com
  • Ownership type: Private
  • Headquarters: Rocky Hill, Connecticut, United States (USA)
  • Founded year: 1988
  • Headcount: 11-50
  • LinkedIn: zuvic-carr

Zuvic Infrastructure Solutions, founded in 1988 and based in Rocky Hill, Connecticut, is a private engineering firm that specializes in civil design and environmental assessment services. With a team of professional engineers, environmental professionals, and land surveyors, Zuvic has built a reputation for delivering comprehensive solutions for site development, environmental remediation, and permitting. The firm primarily serves commercial developers, educational institutions, and utility providers across Connecticut and New England. Zuvic's services extend to transportation design, where they focus on transportation planning and traffic engineering. Their portfolio includes significant projects such as the design and construction inspection for highways, transit terminals, and urban corridors. Zuvic's approach emphasizes collaboration with various stakeholders to create effective and sustainable transportation solutions, ensuring that mobility demands are met while minimizing environmental impacts.


16. B&B Engineering

  • Website: bbengrs.com
  • Ownership type: Private
  • Headquarters: Woodbridge, Connecticut, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2007
  • Headcount: 1-10
  • LinkedIn: b%26b-engineering

B&B Engineering, LLC is a civil engineering and land surveying firm based in Woodbridge, Connecticut. Founded in 2007, the company has built a reputation for its expertise in land development consultation, roadway design, and utility engineering. With a small team of professionals, B&B Engineering focuses on delivering precise and efficient solutions tailored to the specific needs of municipalities and private entities. Their service offerings include land surveying, roadway design, stormwater management, and utility analysis, among others. The firm has been involved in various projects that enhance local infrastructure, such as roadway improvements and pedestrian enhancements, demonstrating their commitment to community-focused engineering solutions. B&B Engineering also emphasizes the importance of stakeholder communication in their projects, ensuring that community needs are considered throughout the engineering process.


17. Dunlap and Associates, Inc.


Dunlap and Associates, Inc. is a consulting firm based in Stamford, Connecticut, founded in 1948. The company focuses on research and consulting services that apply human factors, systems analysis, and risk management techniques. They serve a variety of clients, including government agencies, industries, and the legal profession. Their expertise is particularly relevant in the transportation sector, where they conduct studies on the impact of human behavior on safety outcomes. Notable projects include research on the effects of alcohol and drugs on driving, evaluations of school transportation safety, and assessments of crash countermeasures. Their work is widely published and referenced, indicating a strong presence in the field. Dunlap and Associates also provides expert witness services, further solidifying their role in the transportation safety domain.


18. Martinez Couch & Associates, LLC


Martinez Couch & Associates, LLC (MCA) is an engineering and surveying firm based in Rocky Hill, Connecticut, established in 1999. The company offers a wide range of services, including civil engineering, land surveying, water and wastewater engineering, and regulatory compliance. MCA serves both public and private sector clients, assisting them with various infrastructure and land development projects. Their expertise extends to transportation projects, where they provide site planning, roadway design, and subsurface utility engineering. The firm is committed to delivering quality services and has built a reputation for effective project management and technical support. With a team of skilled professionals, MCA is well-equipped to handle projects of varying complexity, ensuring compliance with local, state, and federal regulations. They are also certified as a Minority Business Enterprise (MBE), Disadvantaged Business Enterprise (DBE), and Small Local Business Enterprise (SLBE), which highlights their commitment to inclusivity in the engineering sector.


19. Banton Construction Company

  • Website: bantonconstruction.com
  • Ownership type: Family Owned
  • Headquarters: North Haven, Connecticut, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1979
  • Headcount: 51-200
  • LinkedIn: banton-construction-co

Banton Construction Company, established in 1979 and based in North Haven, Connecticut, is a family-owned construction firm that specializes in general contracting and electrical services. With a workforce of approximately 49 employees, the company has built a reputation for high-quality construction management and project oversight across various sectors, including transportation and education. Banton has a notable portfolio in transportation, having completed significant projects such as train stations and intermodal transportation centers. Their commitment to safety and quality control is evident in their operations, and they maintain strong relationships with clients, which include both businesses and government entities. The firm has a bonding capacity of $200 million, showcasing its financial stability and ability to handle large-scale projects. Banton's involvement in the transportation sector is marked by their execution of complex projects that require careful planning and coordination, reflecting their capability in this area.


20. DyMar Inc.

  • Website: dymarinc.com
  • Ownership type: Private
  • Headquarters: Southbury, Connecticut, United States (USA)
  • Founded year: 1979
  • Headcount: 11-50
  • LinkedIn: dymar

DyMar Inc. is a civil engineering and land surveying firm based in Southbury, Connecticut, established in 1979. With a team of 22 professionals, the company specializes in a wide range of services, including project planning, regulatory permitting, and construction management. DyMar serves a variety of clients, such as property owners, developers, and government entities, emphasizing high-quality and cost-effective solutions. Their portfolio includes projects across multiple sectors, including residential, commercial, and institutional, with a notable focus on transportation engineering. The firm is committed to identifying potential issues early in the project lifecycle, ensuring that designs are both practical and efficient. DyMar's expertise in transportation engineering is evident in their offerings, which include road design and infrastructure studies, making them a relevant player in this industry.


21. ROTHA Contracting Company, Inc.

  • Website: rothacontracting.com
  • Ownership type: Private
  • Headquarters: Avon, Connecticut, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1991
  • Headcount: 51-200
  • LinkedIn: rotha-contracting

ROTHA Contracting Company, Inc., based in Avon, Connecticut, is a construction firm that specializes in heavy highway and civil engineering projects. Founded in 1991, the company has built a solid reputation for delivering engineered solutions to complex construction challenges. Their services include bridge construction, demolition, dam construction, and utility work, among others. With a workforce of 51-200 employees, ROTHA has a strong presence in Connecticut, Massachusetts, and Rhode Island. The company prides itself on its commitment to safety, quality, and timely project completion, ensuring that all stakeholders share in the success of their projects. Their affiliations with various industry organizations further underscore their involvement in the transportation engineering sector.


22. Terratek International

  • Website: terratekinc.com
  • Ownership type: Private
  • Headquarters: Darien, Connecticut, United States (USA)
  • Employee distribution: Brazil 100%
  • Founded year: 2000
  • Headcount: 51-200
  • LinkedIn: terratek

Terratek International, founded in 2000 and based in Darien, Connecticut, is a private engineering consultancy with a workforce of approximately 73 employees. The firm specializes in providing innovative solutions to complex engineering challenges, particularly in the infrastructure and mining sectors. Their service offerings include asset management, construction management, and geotechnical consultancy. Terratek employs advanced technologies such as Building Information Modeling (BIM) and digital twins to enhance project efficiency and effectiveness. The company has a notable focus on transportation infrastructure, having worked on various projects involving railways, highways, ports, and airports. Their multidisciplinary team is equipped to handle all aspects of design and implementation, ensuring high-quality outcomes for their clients.



Transportation Engineering Insights: Key Companies in Connecticut


CompanyHeadquarterSizeFoundedOwnership
VN Engineers, Inc.North Haven, Connecticut, United States (USA)51-2001983Private
GM2 Associates, Inc.Glastonbury, Connecticut, United States (USA)51-2001988Corporate
AI Engineers, Inc.Middletown, Connecticut, United States (USA)201-5001991Venture Capital
Freeman Companies, LLCHartford, Connecticut, United States (USA)11-502009Private
Garg Consulting Services, Inc.Rocky Hill, Connecticut, United States (USA)51-2001990Private
Cardinal Engineering Associates, Inc.Meriden, Connecticut, United States (USA)11-501962Private
Fuss & O'NeillHartford, Connecticut, United States (USA)201-5001924Private
Luchs Consulting Engineers|DeCarlo & Doll ArchitectsMeriden, Connecticut, United States (USA)11-501948Private
Solli EngineeringMonroe, Connecticut, United States (USA)11-502012Private
WMC Consulting EngineersNewington, Connecticut, United States (USA)11-501988Private
Design Professionals, Inc.South Windsor, Connecticut, United States (USA)11-501986Private
CCA EngineeringBrookfield, Connecticut, United States (USA)11-501978Corporate
BL CompaniesMeriden, Connecticut, United States (USA)201-5001986Private
Celtic EnergyGlastonbury, Connecticut, United States (USA)11-502000Corporate
ZuvicRocky Hill, Connecticut, United States (USA)11-501988Private
B&B EngineeringWoodbridge, Connecticut, United States (USA)1-102007Private
Dunlap and Associates, Inc.Stamford, Connecticut, United States (USA)1-101948Private
Martinez Couch & Associates, LLCRocky Hill, Connecticut, United States (USA)11-501999Private
Banton Construction CompanyNorth Haven, Connecticut, United States (USA)51-2001979Family Owned
DyMar Inc.Southbury, Connecticut, United States (USA)11-501979Private
ROTHA Contracting Company, Inc.Avon, Connecticut, United States (USA)51-2001991Private
Terratek InternationalDarien, Connecticut, United States (USA)51-2002000Private


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