A decision to close an entrance and exit to Birmingham's Moor Street Station could put passengers at risk in the event of emergency evacuation, it has been claimed.
Pressure group Transport 2000 hit out at Chiltern Railways' refusal to open the Moor Street Queensway entrance to platform two.
Passengers have been unable to gain access since an £11 million refurbishment at the end of last year.
The only way in and out of Moor Street is through the main entrance, with customers then having to use a foot-bridge or lifts to reach plat-form two.
Transport 2000 West Midlands chairman Kevin Chap-man claimed closure of the platform two access would s low evacuation in an emergency.
"I dread to think what the consequences would be," Mr Chapman added.
A Chiltern Railways spokesman said the entrance had been closed for safety reasons. More passengers are using the station now than was the case before the refurbishment and the company is worried about overcrowding on platform two.
The spokesman added: "Access for passengers has significantly improved following the renovation of the station. We have created a new concourse and a new footbridge, complete with lifts, providing access to both platforms.