Audit Reports
Structured system health checks document the condition of preemption, detection, ATMS, and traffic cabinet systems, helping agencies maintain reliable records and prioritize maintenance before failures affect roadway operations.
Access dependable support for traffic crash report documentation, agency records workflows, and related traffic control services backed by Traffic Control Corporation’s Midwest infrastructure expertise. From audit documentation and certified hardware testing to field support for intersections, TCC helps transportation agencies, DOT teams, and contractors keep official records clear, equipment validated, and roadway operations accountable.

Documentation, audits, certification, and field services for official traffic control records and agency workflows.
Structured system health checks document the condition of preemption, detection, ATMS, and traffic cabinet systems, helping agencies maintain reliable records and prioritize maintenance before failures affect roadway operations.
Controller, video detection, and conflict monitor repair services provide documented repair and certification support, with warranty work performed at the factory for proper handling and validated equipment status.
Factory-trained technical staff assist with onsite troubleshooting, signal turn-on, detection turn-on, ATMS upgrades, and documentation of field conditions, corrective actions, and recommendations for agency teams.
TCC helps agencies and contractors select traffic signal equipment aligned with DOT specifications, supporting compliant procurement decisions and clearer documentation for transportation infrastructure projects.
Annual MMU and conflict monitor testing verifies that safety-critical signal equipment operates correctly and supports documentation that intersections are protected against conflicting green indications.
Emergency vehicle preemption audits validate priority-green system performance, documenting whether equipment reliably supports emergency response movements through signalized intersections when every second matters.

We begin by clarifying the agency, intersection, equipment, or crash documentation need so your request is routed correctly. This helps align official records support with the right audit, certification, repair, or field service path.
Agencies and contractors rely on TCC for dependable traffic system documentation and support.
Transportation agencies choose TCC for technical depth, regional coverage, and dependable support.
Over 75 years of traffic control experience supports dependable agency documentation and service decisions.
Woodridge-based inventory and Midwest offices help agencies access responsive local support across eleven states.
Factory-trained staff provide technical support for controllers, detection, ATMS, cabinets, and certification needs.
TCC represents 40+ manufacturers, helping Midwest agencies match equipment to real field requirements.
Experienced Midwest traffic control specialists supporting agency needs.
Traffic Control Corporation was founded in 1946 by Joseph Lizzadro, Sr. and Edward R. Hansen at 134 North LaSalle Street in Chicago, Illinois. What began as an exclusive distributor for Automatic Signal Company in Illinois, Indiana, and Wisconsin has grown into a leading Midwest distributor of traffic signal equipment and ITS solutions. Today, from its Woodridge, Illinois headquarters and regional offices in Indiana, Missouri, Minnesota, and Iowa, TCC supports agencies and contractors across eleven states. The team combines decades of transportation technology experience with practical field support, helping communities manage increasingly complex traffic systems with dependable equipment, documentation, training, and service.
Official traffic crash reports are typically issued by the responding law enforcement agency, state crash records unit, or applicable transportation authority. Traffic Control Corporation supports the infrastructure documentation side, including audit records, equipment certification, signal system service documentation, and technical records that may help agencies maintain accurate operational files.
Connect with TCC for documentation, audit, or field service guidance.
TCC supports transportation agencies and contractors across the Midwest with regional offices and field expertise.
11 Midwest States
Service Area
Mon–Fri
Availability
4.8★ GBP
Customer Rating
Ask our team about service availability in your region.
Trusted traffic control expertise since 1946.
Certified technical support for field systems.
Distributor network spanning leading manufacturers.
Tell us what documentation, audit, certification, or field support you need, and our team will route your request to the right traffic systems specialist.
For immediate assistance, feel free to give us a direct call at +1 630-543-1300. You can also send us a quick email at issnews@imagesensing.com.
For immediate assistance, feel free to give us a direct call at +1 630-543-1300. You can also send us a quick email at issnews@imagesensing.com.