Muni Trivia: Name This Mystery Gauge Thing
Photo by @Shanna
We had no idea either, until we asked our Muni driver friend, who has an answer for us. “This is a measure for how much sand is left in the bags on the Light Rail Vehicles. The LRVs use a lot of sand on rainy days or for hard braking.”
The LRVs carry sand under the seats and drops sand onto the tracks for traction on rainy days or for hard braking in other situations.
One mystery solved.