About a month after local residents started complaining about the increased volume of Caltrain horns, the rail agency announced it has lowered the volume of the whistles on all trains to their previous decibel levels.
A spokesperson announced Tuesday that the project to install regulator valves on the horns of all its trains has been completed.
However, Caltrain warned, that doesn't mean those close to the tracks won't still notice a difference between the sound the horns made when they were underneath the trains and the sound they make now. That's because the horns are now on the top of the trains, so the sound will be dispersed over a wider area.
And due to federal regulations, engineers will blow several sequential blasts, instead of the continuous one people are used to hearing.
The volume increase came when Caltrain moved all the horns from the underside to the top of its locomotives and cabs, in order to comply with federal regulations that require a particular sequence of sounds be produced. Caltrain is trying to figure out a way to return the horns to their previous position underneath the train, while still allowing them to produce the proper sound, according to the spokesperson.
Engineers are required to sound the horn a quarter-mile before each grade crossing, where a street crosses the tracks, or if they see someone on the tracks, according to the spokesperson.