Houston TranStar Regional Mobility & Emergency Management Center

Four governments share one traffic-control room in Houston — but the freeway ramp meters and message signs inside it belong to the state, not the city, which only fully owns its own street-signal timing.

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Since 1993 (fully operational 1996), Houston TranStar has run southeast Texas's traffic-and-emergency operations floor from one building shared by four independent governments: the City of Houston, Harris County, TxDOT and METRO. It pools more than 900 regional CCTV cameras, roadway speed sensors and incident reports into one live dashboard, and coordinates freeway message signs and ramp meters (built and owned by TxDOT, not the city) during incidents. The City of Houston's own Traffic Signal Timing and Engineering group is based at TranStar and runs the city's Traffic Signal Performance Improvement Program, which has optimized timing on hundreds of the city's arterial signals since a first 2006–2008 phase covering 225 signals on 19 corridors. During the 2026 FIFA World Cup, TranStar's dashboard fed a joint command center and an adaptive signal system near NRG Park adjusted light timing to real-time traffic speeds instead of a fixed schedule.