time for an end-to-end trip through the entire Red Line is on average 55 minutes. Tracks on all three lines are usually in dedicated right-of-way in the center of the street; however, the southbound tracks between the Wheeler and Museum-District stations run along the left side. The downtown Houston tracks along Capitol and Rusk streets run along the south side of the streets. Furthermore, these light rail trains run in mixed traffic, sharing a lane with buses and other vehicles — often being their turn lane. METRORail operations are controlled from Houston TranStar, a traffic and emergency management center for the city and surrounding region. Trains have priority signalling at intersections except for six stations near the medical center and downtown. At prioritized intersections, traffic lights for road traffic in all directions turn red when a train approaches. Route and infrastructure Red (Main Street) Line The Red Line is a double-tracked, line with 24 stations approximately apart, running from to the Northline Transit Center Station. Almost the entire route is at grade and on city streets. The original 2004 portion from Fannin South to UH-Downtown is entirely at ground-level and at-grade with street traffic. However, on the North/Red Line Extension (from UH-Downtown to Northline Transit Center two small portions are elevated: the Burnett Transit Center station and a small section of track between Melbourne/North Lindale and Northline Transit Center on Fulton Street. Power is supplied at 600–750 volts DC from overhead wires, with nine substations (for the original 2004 portion). The line follows Main Street for eight stations from UH–Downtown to Wheeler station, then follows Fannin Street for the remainder of the original route until Fannin South. Northbound trains run on San Jacinto Street (rather than Fannin) for a small section of the route between the Wheeler and Museum District stations. The North/Red Extension runs along North Main Street until just after Quitman Near Northside, then turns onto Boundary Street until just before Fulton/North Central, and then runs along Fulton Street until Northline Transit Center. Significant businesses and institutions along the Red Line route include the University of Houston–Downtown, Houston's restaurant district near Preston Station, the Downtown Transit Center, Houston's museum district, Rice University, Memorial Hermann Hospital, the Texas Medical Center and NRG Stadium. A park & ride parking lot is available at one station: Fannin South. It has approximately 1,200 parking spaces. Parking fees included a daily rate of