And I feel like there are much better ways to get a train to stop than to try tampering with the tracks...
I would not have made the comment had I not know about that of which I speak.
ANY decent set of jumper cables with usable clips, when connected across the shiny part of the rail will make a low resistance/low impedance connection sufficient to activate the track relay.
Fusees generate a lot of light, a ton of smoke, the cloud being illuminated by the light amplifies the glow making the Fusee(s) more visible. Shine a light into a cloud of smoke.
You presume there are other people available to go up or down track in the manner of brakemen. My assumption is one person with cool enough head to take actions.
Of course in dark territory shorting the tracks won't help. Tell me who other than a railroad employee or a foamer familiar with the territory will know it is dark territory.
Obviously:
Vehicles should not be left in the path of a train or close to the tracks in the fiisst place.
Signals IF PRESENT are the fastest method to signal danger
Flashing lights MAY be of some help
Fusees are a start
How long will it take to get people to run a half mile up or down track to drop a Fusee?
Calling the 800 number takes time
Sometimes you are the windshield, sometimes you are the bug.
Mu suggestions are known and proven.
Nothing is 100 per cent. A train may be running at track speed already in the block, already too close to stop.
You might have crappy rusty jumper cables
Your Fusees might be wet
The vehicle might not be movable even with the 2 or 3 people you want to send up track
Did you even TRY to move the vehicle?
The train may already be bearing down on the site
Your "brakemen" might not be able to run down a right of way fast enough
An incident just may not be preventable
However, comma, doing SOMETHING positive beats just wringing your hands and lamenting