Get SF Weekly Newsletters
Pin It

SandTrans: A Little Bit of Beach Puts the Brakes on Muni 

Wednesday, Feb 5 2014
Comments

Since the city's light-rail vehicles are heavier than a BART car, the term "light rail" is something of a misnomer. The air comfort systems on these Muni trams contain more than two dozen separate electric motors. They are not rudimentary vehicles.

And yet, the miracle substance preventing our hulking, intricate trains from speeding off out-of-control is remarkably low-tech: sand. Without a steady supply of the stuff disgorged from within the trains and trolleys onto the tracks, metal wheels will not stop upon metal tracks. The substance that makes Silicon Valley go also makes trains halt.

As such, Muni's five steel-wheel divisions run through prodigious amounts of sand, ordered from an outfit in Monterey in 30-pound sacks at a rate of 17 cents a pound. The city's historic cable cars dumped 50 tons of sand onto the street last year — alas, the sand is not reusable. That's four times as much sand as the jaunty Italian-made streetcars spat out, but only half as much as the light-rail vehicles housed at Muni's biggest car barn. All told, 256 tons of sand was used last year in preventing trains from running into one another.

Putting this into context, 256 tons of sand would fill a 50-by-25 meter Olympic-sized pool to the depth of one meter — halfway to the top.

That would bring a swim meet to a screeching halt — not unlike a Muni train.

About The Author

Joe Eskenazi

Joe Eskenazi

Bio:
Joe Eskenazi was born in San Francisco, raised in the Bay Area, and attended U.C. Berkeley. He never left. "Your humble narrator" is a staff writer and columnist for SF Weekly, which he has written for since 2007. He resides in the Excelsior with his wife, 4.3 miles from his birthplace and 5,474 from hers... more

Comments

Subscribe to this thread:

Add a comment

Slideshows

  • Trixxie Carr Presents: Maneater at Oasis
    January 14, 2015 was the first night of Trixxie Carr Presents: Maneater at Oasis in San Francisco. Photos by Calibree Photography.
  • No Pants BART Ride 2015 - NSFW
    The No Pants BART Ride commenced on Sunday, Jan. 11, 2015. Participants rode without pants, and at the end of the ride they disembarked at The Mission to bar hop, eat burritos and take selfies. Photos by Richard Haick.

Popular Stories

  1. Most Popular Stories
  2. Stories You Missed