About Hartzog & Crabill, Inc.

Since 1993

About Us

Hartzog & Crabill, Inc. (HCI) is a consulting engineering firm specializing in serving local government agencies with a full array of engineering services, including serving several of our client cities as contract City Traffic Engineer, contract City Engineer, and “on-call” City Traffic Engineer. Specific to traffic engineering and transportation planning, HCI performs various traffic studies including, but not limited to, the following: 

Preparation and review of traffic impact analyses; warrant analyses for traffic control devices (i.e., traffic signals, flashing beacons, Stop signs, crosswalks; in-roadway warning lights); engineering and traffic surveys for establishing speed limits; traffic signal and striping plans, specifications, and estimates (PS&E); development and design of traffic signal coordination systems; on-going remote and local (off-site/on-site) management of traffic signal systems; traffic control plans; and assist cities with coordination of services completed by their traffic signal maintenance contractor. 

HCI also provides construction observation services on behalf of the City relative to the installation of new or upgraded traffic signals, lighting, and copper/fiber optic interconnect communications in order to verify compliance with approved PS&E. Additional services provided by HCI include land survey; plan-checking and approval of subdivision maps; civil engineering design; grading/drainage plan checking; landscape architecture including minor art in public places. 

Since its inception in 1993, HCI has proven itself as a leader in client satisfaction through successful project completion. This is evident in the continued and long-standing relationships we have maintained with our numerous client cities. The successes are attributed to the "hands on" approach that is demonstrated by our principals, Mr. Trammell Hartzog and Mr. Gerald ‘Jerry’ Stock, as well as other staff members. Mr. Jerry Crabill is retired.

In addition to our technical expertise, a cornerstone of HCI’s success is our work ethic, loyalty to our client cities, completion of assigned tasks on schedule, and ability to effectively communicate with the public, City staff, and elected officials.
Hartzog Crabill
Hartzog & Crabill, Inc.
17852 E. 17th Street, Suite 101
Tustin, CA 92780

Phone (714) 731-9455
Fax (714) 731-9498