New technology to catch train fare dodgers is to be deployed at "known hotspots" across Northern's network, Britain's second-largest train operator.
The system is installed at barriers to automatically detect whether a ticket is valid and also sends an alert to staff if additional checks are required.
These additional checks include whether a passenger has the appropriate railcard or is eligible for a child discount.
During a trial of the technology at Manchester Victoria station last month, some 180 fare dodgers were caught in one day alone.
"This technology will be invaluable for our gate line and revenue protection colleagues whose job it is to ensure ticket checks are carried out quickly and efficiently," said Northern's customer and commercial director, Mark Powles.
"Unfortunately, we know that a small minority of customers try to exploit the automated nature of barrier checks to travel on tickets they know they're not eligible to use.
"The kit is very easy to install and can be deployed to known hotspots across the whole network to help tackle this fraudulent activity."