I want to suggest a way of preventing head on collision between trains which are accidently (human/mechanical error) on the same track.

Each train's engine (first rail-car on the train) has a sound device fitted on right side front wheel. This produces a sound at a specific frequency which gets conducted through the rail track (right side). Now since metal conducts sound faster than air (almost 15 times), when the train is moving it is always emitting a sound which gets conducted faster through the rail ahead. Now every train's left front left wheel should have a receiver device which just picks up sound from the rail.

If ever 2 trains are on the same rail-track both train engine's left wheel will pick up the sound emitted from the other train's right wheel and can stop (automically if required).

Now there could be problem if there is a stopped train on the rail. This too can get sorted out because if there is a stopped rail car on the tracks, the metal body of the stopped rail car is joining the two tracks and the moving train engine's own sound emitted from its right wheel will travel through the stopped metal rail car, and transmit through the left rail and stop it. (Since the other train is not moving the time the moving train has to come to a halt is more)

Horrific accidents like the one that happened in North Korea a few days back can be avoided.

What do you think of this idea or comment?
(You can change your vote at any time)

I agree

No opinion

I disagree