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Miami-Dade County buses improve their travel time along the South Dade TransitWay with newly installed Transit Signal Priority technology

MIAMI (July 19, 2018)

Metrobus passengers traveling on two of Miami-Dade County’s most widely used bus routes, 34 Express and 39 Express, are enjoying shorter travel times thanks to new Transit Signal Priority (TSP) technology added to traffic signals along the South Dade TransitWay.

Miami-Dade County has upgraded 46 intersections with Caltran 2070LX Safetran traffic signal controllers on the TransitWay, from SW 344 Street to Dadeland South.

These controllers are providing buses on routes 34 Express and 39 Express signal prioritization when crossing any of the 46 intersections, allowing for a smoother, more seamless bus ride during peak commuting hours. 

The detection sensors on the buses communicate with the controllers, which automatically adjust the traffic signals’ timing to provide buses with longer green-light time, or shorter red-light time at an intersection.

Data recently collected by the Department of Transportation and Public Works (DTPW) has shown a travel time savings of approximately 17 minutes for Route 34 Express, which runs for 20 miles, from Florida City to the Dadeland South Metrorail station, down from 67 minutes 50 minutes. Buses along the South Dade TransitWay travel on dedicated bus lanes, allowing buses to bypass traffic along US 1.

“This is one of many corridors where we’re implementing new traffic signal technology to enhance our mobility and get our infrastructure ready for new developing technology,” said Miami-Dade County Mayor Carlos A. Gimenez.

TSP along the TransitWay is part of a larger five-year, $160 million effort to improve mobility along the County’s ten busiest corridors. In addition to TSP, this effort includes the current 300 smart signals.

“These smart traffic signals can detect when traffic demand is increasing and continuously adjust their own timing to improve traffic flow,” said Alice N. Bravo, P.E., Director of the Department of Transportation and Public Works. “This helps our traffic signals operate more efficiently, and it helps us improve traffic flow for Metrobuses and all other vehicles throughout the County’s main corridors.”

Once fully activated, the smart signals will automatically adjust signal-timing to improve traffic flow and keep signals synchronized as conditions change on the corridors throughout the day. Equipped with cameras, the signals are designed to monitor the intersections and reprogram their own timing to respond more quickly to changing traffic conditions.

Studies along the NW 36 Street corridor, conducted in 2016 when the first smart signals were installed, demonstrated a 10 percent reduction in travel time along the corridor that runs from 71 Avenue to 84 Avenue.

To date, 284 of the traffic signals along the ten corridors have been upgraded with smart signals. The Department is currently testing seven signals in Miami Gardens, from Miami Gardens Drive and NW 87 Avenue to Miami Gardens Drive and NW 73 Avenue; as well as, 31 signals on US1 North, from US1 and SW 98th Street to US1 and SW 62 Avenue. By Monday, July 23, these signals are scheduled to be operating as adaptive signals.