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Business Details
33 Years
experience
Trusted Traffic Engineering Services in Tustin, CA
Hartzog & Crabill has dedicated itself to advancing traffic and civil engineering solutions for over 30 years. Established in 1993, we specialize in serving local government agencies with comprehensive engineering services, including traffic signal design, operations, and transportation planning. Our team of seasoned engineers and technicians brings decades of municipal experience to every project, ensuring technical precision and operational efficiency. We pride ourselves on hands-on leadership from our founding principals and a steadfast commitment to client satisfaction. Our expertise spans traffic signal coordination, civil infrastructure design, and compliance with state and federal standards.

We maintain long-standing partnerships with Southern California cities by prioritizing timely project completion and transparent communication. Our technical staff combines deep knowledge of Caltrans specifications, ADA regulations, and modern traffic management systems. Through continuous on-site oversight and innovative design practices, we address complex urban mobility challenges while delivering cost-effective infrastructure solutions. Our success is built on a reputation for reliability, technical excellence, and dedication to public service improvement.
Services
Traffic Signal Operations Traffic Signal Design Civil Engineering Services Transportation Planning Engineering Services
Details
  • Year established: 1993
Highlights and features
  • We have over 30 years of specialized experience in municipal traffic engineering.
  • Our engineers hold Professional Engineer and Traffic Engineer certifications.
  • We maintain long-standing partnerships with 11 Southern California cities.
  • Our team includes specialists certified by the International Municipal Signal Association.
  • We provide hands-on project management from initial design through construction oversight.
Services
Traffic Signal Operations
We provide continuous traffic signal system monitoring and optimization for 11 Southern California cities. Our specialists use advanced software to manage coordination timing, perform daily performance checks, and implement real-time adjustments. By analyzing traffic patterns and coordinating with maintenance contractors, we ensure reliable signal functionality while reducing municipal operational costs through efficient system management.
Traffic Signal Design
Our team develops comprehensive traffic signal design plans that meet state and local specifications. We conduct field surveys, create detailed CAD drawings, and prepare construction documents that include equipment specifications and cost estimates. By integrating current Caltrans standards and municipal requirements, we deliver signal designs that enhance intersection safety and improve traffic flow efficiency.
Civil Engineering Services
We offer municipal civil engineering solutions covering grading, drainage, and public works projects. Our engineers review construction plans for compliance, manage land development reviews, and provide technical guidance on infrastructure improvements. Through detailed analysis of utility conflicts and roadway geometries, we ensure all projects meet regulatory requirements while supporting community growth objectives.
Transportation Planning
Our transportation planning services include traffic impact analyses, speed limit determination studies, and development of traffic control plans. We help cities prioritize infrastructure investments through data-driven evaluations of existing conditions and future demand. By preparing funding applications for safety improvements, we assist municipalities in securing necessary capital project resources.
Engineering Services
We deliver full-cycle engineering support from initial design through construction management. Our services include plan checking, permit reviews, and field verification of traffic improvements. With expertise in both engineering standards and local agency procedures, we help cities maintain compliant infrastructure systems while addressing unique urban mobility challenges through customized technical solutions.
People
Gerald J. Stock
Executive Vice President
With 33+ years of municipal engineering experience, Mr. Stock serves as Principal-In-Charge for city traffic engineering services. He oversees technical operations and maintains key client relationships for multiple Southern California municipalities through expert project management and strategic planning.
Scott Ma
Senior Engineer
As a licensed Civil and Traffic Engineer with 20+ years experience, Mr. Ma manages traffic engineering services for South Gate. He specializes in traffic studies, permit reviews, and operational improvements that address both technical requirements and community needs.
Bernie Dennis
Senior Traffic Engineer
With 40+ years of municipal traffic engineering experience, Mr. Dennis provides expert guidance on traffic operations and planning. He has established engineering standards for multiple cities and maintains strong agency relationships through technical excellence and clear communication.
Douglas Anderson
Traffic Engineering Manager
Mr. Anderson oversees Tustin's traffic engineering operations with expertise in signal system management and transportation project coordination. He implements traffic control solutions that improve safety while managing infrastructure investments through effective project oversight.
Greg Cabey
Traffic Signal Systems Supervisor
As IMSA Level III certified technician, Mr. Cabey directs traffic signal timing operations. His 32 years of field experience ensures optimal system performance through technical proficiency with signal controllers and coordination software across multiple agency systems.
Questions
What engineering services do you specialize in?
We specialize in traffic signal design and operations, civil engineering, transportation planning, and municipal infrastructure solutions for local governments.
How long have you served municipal clients?
We have partnered with Southern California cities for over 30 years, providing expert engineering services since 1993.
Which cities receive your traffic engineering support?
We operate traffic signal systems in Tustin, Laguna Hills, Yorba Linda, San Juan Capistrano, and eight additional municipalities.
What qualifications do your engineers hold?
Our team includes Professional Engineers (PE), Traffic Engineers (TE), and IMSA-certified traffic signal specialists.
How do you ensure project compliance?
We design projects to current Caltrans specifications, ADA regulations, and local city standards while ensuring state and federal code compliance.