The majority of Melbourne railway station platforms slope towards the tracks at an angle that could make an unsecured pram roll forwards, train operator Metro says.

This shocking revelation comes after a child miraculously escaped with only minor cuts and bruises when his pram rolled off a platform and was hit by a train in Melbourne’s south-east.

The 15-month-old - who was with his grandmother and three-year-old brother - was sitting in his pram at Tooronga railway station at Malvern when it rolled off the platform and into the path of a city-bound train at 11.13am today.

The boy is the second child to survive being hit by a train in Melbourne in less than a year.