Clearing the Tracks with Train-Mounted Lasers

Dec-08-14 In order to keep trains safely on track, a new technology would see them burning away organic matter with on-board lasers.

Leaves pose a dangerous problem every year on train tracks around the world, where they are squished onto the rails by passing trains to create a slippery, Teflon-like coating that reduces the gripping force of the train wheels and affects train signaling systems. Seeking a solution, the Dutch Railways is experimenting with downward-angled lasers mounted in front the train's wheels. These lasers will not only vaporize the accumulated leaf residue, but also dry the rails to help keep more leaves from building up.

The use of lasers was originally proposed in 1999 by LaserThor, who developed the lasers in use now. But the vibrations of the moving train made it difficult to keep the lasers properly focused, and the laser method was passed over in favor of water jets. However, recent improvements in the technology, such as a suspension system and faster cleaning have make the technique viable again.

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[NEWSCIENTIST.COM]

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