Every night between 5 and 7 (depending on the day of the week) Rajdhani Express trains pass through Mughal Sarai enroute to Delhi from the east of India, and the corresponding eastbounds pass through too. Rajdhanis are exclusive Air Conditioned trains that connect the nation's capital with each state capital. Rajdhani is Capital in Hindi (and all other north Indian languages. They usually run in a flight in each direction, one following the other in quick succession, while everything else is held in sidings.
Here is a video of one of those Rajdhanis, the one from Sealdah (Kolkata) to New Delhi passing through a wayside station (Saidraja) between Mughal Sarai (location of the largest marshaling yard in India) and Gaya (of Buddhist fame), at MAS. And yeah, there is no quiet zone. Each of these seem to run with their whistles permanently blasting.
Notice that this one is 20 cars. They are typically somewhere between 15 and 21 cars, with the ones to Kolkata (Sealdah and Howrah) both coming in at 20 or 21 cars. They are pulled by WAP-4, WAP-5 or WAP-7 electric locomotives.
I will post others on this thread as and when I find good ones.