Hundreds of people are expected to turn out to see The Flying Scotsman as it revisits the East Midlands today but rail managers wants to stop people getting too close out of safety concerns.
The famous steam locomotive is due to pass through Melton Mowbray in Leicestershire.
Rail bosses have said people are dicing with death by trespassing on the tracks and behaving irresponsibly on platforms - just to catch a glimpse of the national treasure when it passes through.
They say the famous steam train could be banned from the mainline if people continue to ignore the safety messages.
More than 50 services were delayed when the Flying Scotsman was in the region last month.
Network Rail's Head of Operations Neil Henry said:
We don't want to see a time when we can't run wonderful steam engines on the line but clearly if continued disruption happens then Network Rail needs to take the appropriate action.
Network Rail say more staff will be working on Saturday to keep trains moving and to ensure people are safe.