Irish Rail says its expanding its remote monitoring centre to deal with increased anti social behaviour on the DART.
Drivers are threatening they could strike over safety fears after a string of gang-related incidents over the past two months.
Last Friday passengers leaving the Liam Gallagher concert in Malahide were stuck on board for 90 minutes after a fight broke out and a driver was intimidated.
Irish Rail’s Barry Kenny says they have singled out stations where dedicated security will be deployed.