Why are BART trains so loud? Screeeeech, nothing sounds quite so piercing as a BART train zipping through the Transbay Tube. A few years ago, a Chronicle study found that the loudest stretches of track topped out at 100 decibels; 85 decibels is considered the threshold for potential hearing damage.
Why are modern trains so quiet?
Modern railcars glide with low friction, says David Rangel, deputy director of Modoc Railroad, a training school for future train engineers; "At age 62, I could push a train car down a track." In addition, crushed rock underneath the tracks helps diminish impact, all of which lessens the noise that many have come to …
Are the new BART trains faster?
Q9: Will the new cars be faster? A: No. The new cars have a maximum speed of 80 miles per hour. To go faster than that, changes would need to be made, not only to the rail car propulsion systems, but also to other BART infrastructure.
What is the top speed of the BART train?
BART has 8 DMU train cars which each have a seating capacity of 104. 70 mph maximum; 35 mph average, including 20-second station stops. For BART to Antioch DMU trains, the maximum speed is 75 mph; 60 mph average.
Why is the BART train so loud?
Kolesar says that makes the trains quiet on the straightaways, which constitute a majority of BART's tracks. But because of the design, one of the wheels ends up getting dragged against the rail on turns, which causes that high-pitched squeal. “So one wheel has to be sliding while the other is rolling,” Kolesar says.
Are the new BART trains quieter?
Are trains getting quieter?
Newer locomotives have become much quieter in recent years due to noise regulations being implemented by countries and regions. However, there are still times that a locomotive may develop a defect in its turbocharger, which produces a whine that can be heard for many kilometers.
Why are BART trains so loud?
Because the inner radius is smaller, there is less distance to travel, which can cause a slippage between the wheels and track, which is noisy. Why did it take so long to build the Warm Springs BART station?
How deep does the BART go under water?
Engineering History was MadeConstructed in 57 sections, and reposing on the bay floor as deep as 135 feet beneath the surface, the remarkable $180 million structure took six years of toil and seismic studies to design, and less than three years to contract.
How do people not hear trains coming?
Surrounding terrain also can affect sound. For instance, in the instance of a train passes through a corridor of trees, those trees can muffle the sound in much the same way as sound baffles that line the walls of a recording studio.
Why is BART ridership so low?
The survey shows ridership declined when many stopped commuting and started working from home. However, with the COVID-19 pandemic under control, ridership still struggles. The survey shows 45% of people are choosing not to ride BART because they don't think it is safe. While 17% describe BART as safe.
Why is BART noisy?
Like most trains, BART wheels are tied together with rigid axels and no differentials. This means the wheels always rotate at the same speed, even around corners. Because the inner radius is smaller, there is less distance to travel, which can cause a slippage between the wheels and track, which is noisy.