Michigan Central Signal Control System – Phases 1 and 2
The Michigan Central Signal Control System project shows how the Michigan Department of Transportation (MDOT) worked with Econolite to build a centralized signal control system using the Centracs® Advanced Traffic Management System (ATMS). With this system, MDOT operators can manage signal timing and network performance remotely across many intersections statewide, improving efficiency and responsiveness.
Project Background
MDOT needed a more capable way to coordinate and manage its traffic signal network across Michigan. Therefore, the agency partnered with Econolite Systems, Inc. (ESI) to deploy a centrally controlled signal system that supports improved traffic management, performance data collection, and adaptive operations. Phase 1 focused on bringing hundreds of intersections online. Phase 2 expanded central control to additional locations and added advanced analytics capabilities.
System Deployment – Phase 1
In Phase 1, MDOT connected 286 controlled intersections to the Centracs ATMS platform. These signals use a combination of Econolite Cobalt and Siemens (Yunex) M60 traffic signal controllers. Econolite performed detailed testing and documentation before the system went live. In addition, a complete test environment was set up so MDOT and Econolite can test software updates before they reach the live network.
System Expansion – Phase 2
Phase 2 expanded the central signal control network by connecting an additional 1,250 signalized intersections. Moreover, this phase introduced Signal Performance Measures (SPM) to help operators monitor and analyze performance trends. Adaptive signal control was also added at about 60 intersections along the Interstate 94 corridor in Detroit. The project included a center‑to‑center connection with Oakland County, Michigan, to support shared operations and data exchange.
Key Features of the Control System
- Centralized signal timing management across a statewide network
- Integration with both Econolite and Yunex traffic signal controllers
- Signal Performance Measures for data visibility and analytics
- Adaptive control at select high‑impact intersections
- Test environment for software updates and quality assurance
Operational Benefits
As a result of this phased deployment, MDOT now enjoys:
- Remote real‑time management of signals statewide
- Improved performance insights with SPM analytics
- Scalable infrastructure for future traffic technologies
- Enhanced coordination between regional partners like Oakland County
- Reduced manual effort for timing plan updates
Overall, the Michigan Central Signal Control System strengthens the state’s traffic network, supports smarter operations, and provides a platform for adaptive and connected vehicle technologies in the future.
