Extra police will be patrolling rail services along the Cambrian Railway in and through Newtown this Bank Holiday weekend.
British Transport Police said the patrols were due to an expected rise in passengers using the line to reach Shrewsbury and Aberystwyth.
It also comes following reports of a planned fight in Aberystwyth between people from Welshpool and the coastal town.
Operational resilience manager, Joshua Hopkins, said: “Unfortunately there is still a small minority of people who are choosing to put themselves, other passengers and our staff at risk through anti-social behaviour on our services and at stations.
“We will have a strong presence of TfW, security and British Transport Police staff across the network to ensure it remains a safe environment for people wishing to travel.
“People may find there are queuing systems in place or other crowd control measures and it is important people respect and listen to our frontline staff at all times.
“Our staff do have the right to refuse travel if people are abusive or too intoxicated to travel."