Work is about to begin on a project to raise the height of platform 4 at Elephant & Castle railway station.
The platform, which is used by southbound trains, is on a curve and there are many signs warning passengers to take extra care because of the height difference between the train and the platform.
"For many years we have recognised that the gap on platform 4 at Elephant & Castle needs to be addressed and we are delighted that Network Rail is now carrying out this work," said Keith Jipps, customer service director at First Capital Connect.
"This will make it easier and safer for our passengers to board and alight our services."
The project, which is due to be completed by late August, involves the construction of a gently sloping surface from the back of the platform rising closer to the train doors.
A similar scheme was completed at Tulse Hill station in April this year.
Throughout the work the platform will remain open although areas will be fenced off at times.