A temporary metal scanner has been set up at Nottingham train station as part of a crackdown on crime.
The week-long initiative will see the airport-style machine used to make sure no-one is taking weapons on to any of the services from the city.
Officers said the move would send out a clear message that threatening behaviour would not be tolerated.
But police admitted some passengers may find the scanners intimidating and all feedback would be considered.
Sgt Mark Clements, from British Transport Police, said: "It is designed to reassure the public that we are taking proactive steps to identify people with weapons and this sort of behaviour will not be permitted.
"Obviously this is an open access network and it wouldn't be at all stations but if people are reassured by it, we would look at deploying it more."
The scanner is part of "Not in my Neighbourhood", a week-long initiative with Nottinghamshire police designed to cut incidents of everyday crime and anti-social behaviour.