BART to install noise-dampening equipment
The dampers are made of steel and rubber and physically clamp onto the rail every 30 inches and help lessen the vibration that causes the well-known screeching noise when trains travel over the track.
In 2012 BART installed dampers on a curved section of track on the aerial guideway between North Berkeley and El Cerrito Plaza stations.
"The impact has been noticeable," said Greg Shivy, principal track engineer at BART. "Not only is the ride quieter by an average of several decibel points and noise complaints down, but the need to grind the rail to smooth it went from twice a year to once every four years. Less grinding also extends the life of the rail."
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