Since the start of last year, there've been 128 incidents of anti-social behaviour on the DART
You text the word TRAIN followed by the location, carriage number, and details of the incident to 51444.
It'll be sent to a live-monitored security centre during operational hours which can then contact security teams.
The company say they'll also be putting more staff on trains to crack down on anti-social behaviour.
It's hoped workers will be kitted out before the end of this year.