what is the red light flashing on the last car of a train?

Question

thanks for the answers it's called a E.O.T device which checks the air flow the rear of the train in case the train has to stop quickly it can be busted into quick service to stop the train from back to front so the cars wont derail forward

Answer 1

I think that's like the red light district of the train.. you know,, the prostitutes.

Answer 2

The flashing rear-end device, or "FRED," (also called an end-of-train device or EOT) is an electronic device mounted on the end of North American freight trains in lieu of a caboose.

More than just a flashing red taillight, the FRED monitors functions such as brake line pressure and accidental separation of the train using a motion sensor, functions that would have been monitored by a crew in the caboose. The FRED transmits the data via a telemetry link to the Head-of-Train Device (HOT) in the locomotive, known colloquially among railroaders as a Wilma—the FRED is said to be "married to Wilma," a play on Fred Flintstone's wife from The Flintstones cartoon. A typical HOT contains a number of indicator lights indicating telemetry status and rear-end movement as well as a digital readout of the brake pipe pressure transmitted by the FRED. It also contains a toggle switch used to place the train's brakes into emergency from the rear end. In modern locomotives, the HOT is built into the locomotive's computer system, and the data is displayed on the engineer's computer screen.

Answer 3

An indication that it is the last car of a train.

Answer 4

It's a warning light for any trains behind it.

Answer 5

means all clear.......last car.