Transportation engineering companies in Illinois play a critical role in shaping the state's infrastructure, focusing on the design and improvement of transportation systems. This industry includes firms specializing in bridge construction, road design, traffic analysis, and intelligent transport systems. Emerging trends such as smart highways and sustainable engineering practices are guiding these companies into the future. With a growing emphasis on urban mobility and green initiatives, these businesses are adapting to meet the evolving demands of cities and communities, making significant investments in technology and innovation.


This list includes 22 transportation engineering companies based in Illinois, varying in size from small firms to robust organizations with over 1000 employees. The companies are headquartered in key locations, including Chicago, Itasca, and Springfield, and were established between 1944 and 2017. Specializations range widely, covering services from traffic engineering to construction management, reflecting the sector's varied needs.


Continue reading to discover the top transportation engineering companies in Illinois.


Top 22 Transportation Engineering Companies in Illinois


1. Lochner

  • Website: hwlochner.com
  • Ownership type: Private
  • Headquarters: Chicago, Illinois, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1944
  • Headcount: 1001-5000
  • LinkedIn: lochner

Lochner is an infrastructure services firm based in Chicago, Illinois, specializing in engineering and design, construction management, and environmental consulting. Founded in 1944, the company has built a strong reputation for enhancing transportation and water systems across the United States. With a workforce of over 800 employees, Lochner operates in various markets, including aviation, highways, bridges, transit, and water management. Their services range from planning and environmental assessments to construction engineering and inspection. Lochner's commitment to quality and innovation is evident in their project portfolio, which includes significant contributions to urban transit systems, highway improvements, and water infrastructure projects. The firm actively collaborates with both public and private sector clients, ensuring that their solutions meet the evolving needs of communities. Their recent recognition as #103 in the 2024 ENR Top 500 Design Firms further underscores their standing in the industry.


2. TranSmart

  • Website: transmartinc.com
  • Ownership type: Family Owned
  • Headquarters: Chicago, Illinois, United States (USA)
  • Employee distribution: United States (USA) 90%, Indonesia 6%, India 4%
  • Founded year: 1986
  • Headcount: 51-200
  • LinkedIn: transmart-technologies-inc.

TranSmart Technologies, Inc. is an engineering firm based in Chicago, Illinois, specializing in transportation solutions since its inception in 1986. The company offers a comprehensive suite of services, including traffic engineering, roadway design, intelligent transportation systems, and construction management. TranSmart serves both government and private sector clients, focusing on improving transportation infrastructure while addressing complex environmental challenges. With a team of experienced engineers and planners, they manage projects from feasibility studies to construction oversight. In March 2022, TranSmart became a subsidiary of Atlas Technical Consultants, enhancing its capabilities and expanding its reach in the Midwest and beyond. The firm is committed to fostering a diverse workforce and actively supports initiatives that promote inclusion within the industry.


3. Civiltech Engineering, Inc.

  • Website: civiltechinc.com
  • Ownership type: Private
  • Headquarters: Itasca, Illinois, United States (USA)
  • Employee distribution: United States (USA) 97%, Other 3%
  • Founded year: 1988
  • Headcount: 51-200
  • LinkedIn: civiltechinc

Civiltech Engineering, Inc., based in Itasca, Illinois, is a private engineering firm established in 1988. With a workforce of approximately 133 employees, the company specializes in transportation and civil engineering services. Civiltech offers a wide range of services, including transportation design, traffic engineering, construction engineering, and environmental studies. They primarily serve municipalities and government agencies, focusing on delivering innovative solutions that enhance community infrastructure and improve transportation networks. Their projects reflect a commitment to safety, sustainability, and efficiency, addressing the needs of various stakeholders. Civiltech is prequalified with the Illinois Department of Transportation, which underscores their credibility and expertise in the field. The firm actively engages in community projects, such as the development of bike paths and urban design initiatives, showcasing their dedication to improving local transportation systems.


4. Atlas Engineering Group, Ltd.

  • Website: aegroupltd.com
  • Ownership type: Private
  • Headquarters: Deerfield, Illinois, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2007
  • Headcount: 51-200
  • LinkedIn: atlas-engineering-group-ltd-

Atlas Engineering Group, Ltd. (AEG), founded in 2007 and based in Deerfield, Illinois, is a private consulting engineering firm that specializes in civil engineering, transportation, land surveying, and construction management services. The company serves both public sector agencies and private clients, providing innovative solutions for various infrastructure projects. AEG is particularly noted for its work in transportation engineering, where it has developed expertise in areas such as traffic data collection, intelligent transportation systems, and rail and transit engineering. The firm is certified as a Woman-Owned Business Enterprise (WBE) and a Disadvantaged Business Enterprise (DBE), which reflects its commitment to diversity and inclusion in the engineering sector. AEG has established prequalifications with several state departments and local agencies, allowing it to participate in significant transportation projects across Illinois and beyond. Their mission emphasizes creating sustainable impacts and enhancing community mobility, which positions them as a relevant player in the transportation engineering industry.


5. TERRA Engineering, Ltd.

  • Website: terraengineering.com
  • Ownership type: Corporate
  • Headquarters: Chicago, Illinois, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Latest funding: June 2021
  • Founded year: 1992
  • Headcount: 51-200
  • LinkedIn: terra-engineering

TERRA Engineering, Ltd. is a woman-owned engineering firm based in Chicago, Illinois, established in 1992. The company specializes in a wide array of engineering services, including construction engineering, electrical engineering, municipal engineering, and notably, transportation engineering. TERRA serves both municipalities and private developers, focusing on infrastructure projects that meet regulatory standards while also pushing for innovative and sustainable solutions. Their team is composed of over 100 professionals who bring a wealth of knowledge and experience to their projects. TERRA has successfully completed numerous transportation engineering projects, demonstrating their ability to handle both small-scale and large-scale initiatives. Their work includes traffic surveys, data collection, and traffic signal design, showcasing their technical expertise in the field. TERRA has also received various awards for their projects, reflecting their commitment to quality and excellence in engineering.


6. Pinpoint Precision Engineering


Pinpoint Precision Engineering is a civil engineering firm based in Chicago, Illinois, founded in 2017. With a team of 11 to 50 employees, the company focuses on delivering high-quality engineering services, particularly in transportation, construction management, and utilities. They have worked on various projects, serving both government clients and private businesses, and have secured contracts with notable organizations such as the Illinois Department of Transportation and the Illinois Tollway. Their projects include traffic studies, highway design, and construction inspection, showcasing their expertise in transportation engineering. Pinpoint is also committed to community engagement, offering mentorship programs and educational initiatives to inspire the next generation of engineers. This focus on education and sustainability highlights their role in shaping the future of civil engineering.


7. Chastain & Associates LLC


Chastain & Associates LLC, based in Decatur, Illinois, is a civil engineering firm that specializes in infrastructure development and engineering services. Established in 1954, the company has built a reputation for its expertise in transportation engineering, municipal engineering, and land development. Chastain provides a comprehensive range of services, including the design and construction inspection of highways, roadways, and bridges. They have a significant track record, having completed over 120 transportation projects for the Illinois Department of Transportation and numerous projects for the Illinois Tollway. The firm operates with a collaborative mindset, focusing on sustainable solutions that enhance community connectivity. With a workforce of 51-200 employees, Chastain has expanded its reach through acquisitions and branch offices across Illinois, Kentucky, and Indiana, allowing them to serve a broader client base in both the public and private sectors.


8. CKL Engineers, LLC

  • Website: ckleng.com
  • Ownership type: Family Owned
  • Headquarters: Chicago, Illinois, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2009
  • Headcount: 11-50
  • LinkedIn: cklengineersllc

CKL Engineers, LLC, based in Chicago, Illinois, is a family-owned engineering and construction management firm founded in 2009. With a workforce of 43 employees, the company provides a wide array of services that include aviation, environmental engineering, mass transit, rail, and toll roads. CKL Engineers is dedicated to delivering high-quality infrastructure projects while ensuring compliance with regulatory standards. The firm has established itself as a reliable partner for both government agencies and private sector clients. Notably, CKL has been involved in significant projects such as the reconstruction of bridges over I-90/94 and the University Park Metra station. Their commitment to community outreach and education, particularly in STEM initiatives, reflects their engagement with the communities they serve. CKL Engineers has also been recognized as one of Chicago's Best and Brightest Companies to Work For, highlighting their positive workplace culture and employee satisfaction.


9. OSEH Inc.

  • Website: osehinc.com
  • Ownership type: Private
  • Headquarters: Wheaton, Illinois, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2017
  • Headcount: 11-50
  • LinkedIn: oseh-inc

OSEH Inc., founded in 2017 and based in Wheaton, Illinois, is a private civil engineering firm that focuses on the design and management of transportation infrastructure. With a team of 21 employees, including six registered professional engineers, OSEH Inc. brings over 160 years of collective experience to the table. The firm offers a comprehensive range of services, from data collection to contract plans, specifications, and estimates (PS&E) for highway and roadway design. Their aviation services include civil airside design and construction management, with current projects like the Terminal Area Plan for O'Hare 21. OSEH also engages in municipal projects, assisting local governments with roadway design and stormwater management, and has successfully helped secure grants for infrastructure improvements. Their rail and transit expertise covers civil and structural design, as well as environmental and noise analysis, showcasing their capability to handle complex transportation projects.


10. Imeg

  • Website: imegcorp.com
  • Ownership type: Private
  • Headquarters: Rock Island, Illinois, United States (USA)
  • Employee distribution: United States (USA) 84%, India 16%
  • Founded year: 1955
  • Headcount: 1001-5000
  • LinkedIn: imeg-corp

IMEG is an engineering consulting firm based in Rock Island, Illinois, founded in 1955. With a workforce of nearly 1,900 employees, the company specializes in high-performance building design and infrastructure solutions. IMEG provides a wide array of services, including civil, structural, mechanical, and electrical engineering, as well as sustainability and performance optimization. Their infrastructure services specifically highlight their involvement in transportation engineering, where they address the design and planning of roads, highways, and bridges. IMEG serves a broad spectrum of clients, from government agencies to private corporations, and operates through a network of nearly 3,000 team members across the United States. Their focus on creating positive outcomes for communities and their commitment to sustainability further enhance their profile in the engineering sector.


11. OMEGA & Associates, Inc.

  • Website: omegaassociates.com
  • Ownership type: Private
  • Headquarters: Lisle, Illinois, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2002
  • Headcount: 51-200
  • LinkedIn: omegaassociatesinc

OMEGA & Associates, Inc., known as TranSystems, is a private engineering consulting firm based in Lisle, Illinois. Founded in 2002, the company has grown to employ between 51 and 200 professionals. TranSystems specializes in infrastructure development, offering a wide array of services that include architecture, bridge design, environmental consulting, and project management. Their expertise is particularly pronounced in transportation engineering, where they assist clients in navigating complex engineering challenges and regulatory requirements. TranSystems has been involved in numerous high-profile projects, such as the Chicago O’Hare Multi-Modal Facility and the Jane Byrne Interchange, showcasing their capability in handling significant transportation infrastructure. The firm has also been recognized in the industry, ranking as the 58th top design firm by ENR and the 8th top bridge design firm, indicating their relevance and impact in the transportation engineering sector.


12. Oates Associates, Inc.

  • Website: oatesassociates.com
  • Ownership type: Private
  • Headquarters: Collinsville, Illinois, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1980
  • Headcount: 11-50
  • LinkedIn: oates-associates-inc-

Oates Associates, Inc. is a civil engineering firm based in Collinsville, Illinois, established in 1980. With a workforce of approximately 59 employees, the company provides a range of engineering and consulting services, primarily focusing on transportation planning, site development, and structural engineering. Oates Associates has built a reputation for improving infrastructure and ensuring regulatory compliance, serving both municipalities and private sector clients. Their project portfolio highlights significant transportation initiatives, including road and bridge projects that address local needs and enhance community connectivity. The firm operates four offices across the Midwest, reinforcing its commitment to regional development and infrastructure improvement. Oates Associates prides itself on fostering a culture of trust and dedication, with many project managers having long tenures at the firm, contributing to its stability and expertise in the field.


13. Lin Engineering, Ltd.

  • Website: lineng.com
  • Ownership type: Private
  • Headquarters: Springfield, Illinois, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1991
  • Headcount: 11-50
  • LinkedIn: lin-engineering-ltd-

Lin Engineering, Ltd. is an engineering consulting firm based in Springfield, Illinois, specializing in structural, transportation, and hydraulic engineering services. Founded in 1991, the company has built a strong reputation for its work with government agencies and design firms, focusing on project planning, design, and inspection to ensure compliance and quality in infrastructure development. The firm employs a skilled team of civil, structural, and hydraulic engineers, as well as land surveyors, who collaborate on a variety of projects. Lin Engineering has been involved in significant transportation projects, including roadway designs and construction inspections, and has received multiple awards for engineering excellence. Their commitment to quality assurance and client service is evident in their management philosophy, which emphasizes meeting production schedules while maintaining high standards. Lin Engineering is prequalified in various areas, including highways, structures, and special studies, further solidifying its position in the transportation engineering sector.


14. BLA, Inc.

  • Website: bla-inc.com
  • Ownership type: Private
  • Headquarters: Itasca, Illinois, United States (USA)
  • Employee distribution: United States (USA) 97%, India 3%
  • Founded year: 1978
  • Headcount: 51-200
  • LinkedIn: bollinger-lach-%26-associates

BLA, Inc. is a civil engineering consulting firm based in Itasca, Illinois, with a secondary office in Indianapolis, Indiana. Established in 1978, the company specializes in various engineering services, including transportation design, traffic engineering, construction management, and municipal engineering. BLA, Inc. serves both municipalities and private sector clients, providing comprehensive solutions to ensure projects are completed efficiently and effectively. Their expertise in transportation planning and geometric design allows them to handle a wide range of projects, from municipal road programs to complex intersection designs. The firm prides itself on client service, emphasizing communication and coordination with stakeholders throughout the project lifecycle. With a team of skilled professionals, BLA, Inc. has successfully completed numerous projects in the greater Chicagoland and Indianapolis areas, showcasing their commitment to enhancing transportation infrastructure.


15. Crawford, Murphy & Tilly

  • Website: cmtengr.com
  • Ownership type: Private
  • Headquarters: Springfield, Illinois, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1946
  • Headcount: 201-500
  • LinkedIn: cmtengineering

Crawford, Murphy & Tilly, Inc. (CMT) is an engineering consulting firm based in Springfield, Illinois, established in 1946. The company specializes in infrastructure development, offering a wide array of services that include air service development, environmental consulting, and strategic funding solutions tailored for airports and municipalities. CMT's team comprises experienced planners, engineers, scientists, and consultants who work collaboratively to address the intricate challenges associated with infrastructure projects. Their expertise spans various sectors, including aviation, civil engineering, rail, and water resources, making them a versatile player in the transportation engineering field. CMT has successfully partnered with numerous airports and municipalities, helping them secure new air services and improve existing infrastructure. Their commitment to community engagement and sustainability is evident in their initiatives that support local development and environmental stewardship.


16. Applied Pavement Technology, Inc


Applied Pavement Technology, Inc. (APTech) is a consulting firm based in Champaign, Illinois, specializing in pavement engineering and asset management solutions. Established in 1994, APTech has built a reputation for providing comprehensive services that include pavement evaluation, design, and management for both airport and roadway agencies. The firm employs advanced technology, such as their Enhanced Data Gathering Equipment (EDGE), to collect and analyze pavement condition data efficiently. APTech's expertise extends to applied research and training, ensuring that clients are equipped with the latest knowledge and practices in pavement management. Their clientele ranges from local municipalities to state agencies, reflecting their capability to handle projects of varying scales. With a commitment to sustainability and performance optimization, APTech continues to play a vital role in enhancing transportation infrastructure across the United States and beyond.


17. Orion Engineers, PLLC

  • Website: orionengineersllc.com
  • Ownership type: Private
  • Headquarters: Chicago, Illinois, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2015
  • Headcount: 11-50
  • LinkedIn: orionengineers

Orion Engineers, PLLC is an engineering consulting firm based in Chicago, Illinois, specializing in civil, structural, and construction engineering services. Established in 2015, the firm has quickly made a name for itself in the Midwest, serving both government and industry clients. Orion Engineers provides expertise in project planning, design, and construction management across various sectors, including buildings, transportation, and utilities. Their transportation engineering services include feasibility studies, traffic analysis, highway design, and bridge inspections, among others. The firm has been involved in notable projects such as the I-39 at IL-38 interchange study and construction oversight for the Illinois Tollway, demonstrating their active engagement in the transportation sector. Orion Engineers is committed to delivering quality and innovative solutions, making them a relevant player in the engineering consulting industry.


18. HMG Engineers, Inc.

  • Website: hmgengineers.com
  • Ownership type: Private
  • Headquarters: Breese, Illinois, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1966
  • Headcount: 11-50
  • LinkedIn: hmg-engineers-inc-

HMG Engineers, Inc., also known as Henry, Meisenheimer & Gende, Inc., is a private engineering firm based in Breese, Illinois. Established in 1966, the company specializes in transportation and water infrastructure solutions. With a workforce of 32 employees, HMG Engineers provides a comprehensive suite of services, including engineering, surveying, and geomatics. They serve a variety of clients, from small villages to major urban centers, and are involved in projects ranging from local road improvements to major interstate developments. The firm prides itself on delivering innovative and award-winning engineering solutions, emphasizing effective communication and collaboration with clients throughout the project lifecycle. HMG Engineers is also 100% employee-owned, which may contribute to their commitment to quality and client satisfaction.


19. Thomas Engineering Group, LLC (TEG)


Thomas Engineering Group, LLC (TEG) is a civil engineering firm based in Oak Brook, Illinois, founded in 2008. The company provides a range of services, primarily focusing on transportation planning, construction engineering, and environmental consulting. TEG works closely with state, county, and local government agencies, assisting them with various infrastructure projects aimed at improving public safety and mobility. Their expertise includes conducting feasibility studies, designing intersections and interchanges, and performing traffic and safety engineering. TEG has been involved in notable projects such as the reconstruction of the Fox River Bridge and the improvement of high-traffic intersections, showcasing their capability in handling complex transportation challenges. The firm prides itself on delivering high-quality service and innovative solutions tailored to the needs of their clients, contributing to the enhancement of community infrastructure.


20. WBK Engineering

  • Website: wbkengineering.com
  • Ownership type: Private
  • Headquarters: St. Charles, Illinois, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1998
  • Headcount: 11-50
  • LinkedIn: wbkengineering

WBK Engineering, founded in 1998 and based in St. Charles, Illinois, is a private engineering firm that specializes in civil, environmental, and transportation engineering. With a team of skilled professionals, the company provides a wide range of services, including architecture, project management, and environmental consulting. WBK Engineering is particularly noted for its work with federal, municipal, and Indigenous clients, focusing on sustainable solutions for infrastructure and community development. The firm has been involved in numerous projects that enhance transportation systems, such as roadway reconstruction and rehabilitation, traffic modeling, and construction oversight. Their commitment to protecting natural ecosystems while improving infrastructure reflects a modern approach to engineering challenges. As a tribally-owned business, WBK Engineering also emphasizes its connection to the Pokagon Band of Potawatomi, integrating cultural values into its operations and community engagements.


21. HBM Engineering Group, LLC

  • Website: hbmeng.com
  • Ownership type: Private
  • Headquarters: Hillside, Illinois, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2003
  • Headcount: 11-50
  • LinkedIn: hbm-engineering-group-llc

HBM Engineering Group, LLC, based in Hillside, Illinois, is a private engineering firm founded in 2003. With a team of approximately 36 professionals, HBM focuses on civil and structural engineering services, particularly in transportation engineering. The firm has worked on numerous infrastructure projects, including major highway interchanges and bridge rehabilitations, showcasing their expertise in enhancing transportation systems. HBM's clientele includes both government agencies and private sector organizations, reflecting their ability to navigate complex project requirements. The company is dedicated to sustainability and innovation, integrating these principles into their engineering solutions. HBM has received various qualifications from the Illinois Department of Transportation (IDOT) and the Chicago Department of Transportation (CDOT), further solidifying their role in the transportation engineering industry. They have also been recognized with multiple awards for their project excellence, underscoring their commitment to quality and safety in engineering.


22. Baxter & Woodman

  • Website: baxterwoodman.com
  • Ownership type: Private
  • Headquarters: Crystal Lake, Illinois, United States (USA)
  • Employee distribution: United States (USA) 99%, Other 1%
  • Founded year: 1946
  • Headcount: 201-500
  • LinkedIn: baxter-%26-woodman

Baxter & Woodman is an engineering and consulting firm based in Crystal Lake, Illinois, with a history dating back to 1946. The company specializes in infrastructure planning, design, and construction, providing a wide array of services that include community and urban planning, water resources management, and wastewater treatment. Notably, they have a dedicated transportation engineering division that focuses on projects such as thoroughfare planning, access management, and multi-modal transportation strategies. Their client base primarily consists of municipalities and private organizations, reflecting their commitment to enhancing community value through sustainable engineering solutions. With a workforce of approximately 357 employees, Baxter & Woodman is well-equipped to tackle complex engineering challenges and deliver innovative solutions that meet the needs of the communities they serve.



Transportation Engineering Insights: Key Companies in Illinois


CompanyHeadquarterSizeFoundedOwnership
LochnerChicago, Illinois, United States (USA)1001-50001944Private
TranSmartChicago, Illinois, United States (USA)51-2001986Family Owned
Civiltech Engineering, Inc.Itasca, Illinois, United States (USA)51-2001988Private
Atlas Engineering Group, Ltd.Deerfield, Illinois, United States (USA)51-2002007Private
TERRA Engineering, Ltd.Chicago, Illinois, United States (USA)51-2001992Corporate
Pinpoint Precision EngineeringChicago, Illinois, United States (USA)11-502017Private
Chastain & Associates LLCDecatur, Illinois, United States (USA)51-2001954Private
CKL Engineers, LLCChicago, Illinois, United States (USA)11-502009Family Owned
OSEH Inc.Wheaton, Illinois, United States (USA)11-502017Private
ImegRock Island, Illinois, United States (USA)1001-50001955Private
OMEGA & Associates, Inc.Lisle, Illinois, United States (USA)51-2002002Private
Oates Associates, Inc.Collinsville, Illinois, United States (USA)11-501980Private
Lin Engineering, Ltd.Springfield, Illinois, United States (USA)11-501991Private
BLA, Inc.Itasca, Illinois, United States (USA)51-2001978Private
Crawford, Murphy & TillySpringfield, Illinois, United States (USA)201-5001946Private
Applied Pavement Technology, IncChampaign, Illinois, United States (USA)51-2001994Private
Orion Engineers, PLLCChicago, Illinois, United States (USA)11-502015Private
HMG Engineers, Inc.Breese, Illinois, United States (USA)11-501966Private
Thomas Engineering Group, LLC (TEG)Oak Brook, Illinois, United States (USA)11-502008Private
WBK EngineeringSt. Charles, Illinois, United States (USA)11-501998Private
HBM Engineering Group, LLCHillside, Illinois, United States (USA)11-502003Private
Baxter & WoodmanCrystal Lake, Illinois, United States (USA)201-5001946Private


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