A full service is expected on the Brockenhurst-Lymington line from Thursday.
One train per hour is running between Brockenhurst and Lymington Pier at a reduced speed.
Passengers going between Brockenhurst and Lymington Pier will need to use a rail replacement bus.
Maisy, 15, suffered multiple bleeds on the brain in a Boxing Day riding accident.
Replacement buses are running as repair work is carried out on the New Forest branch line.
The vehicle was ablaze at Brockenhurst level crossing in the New Forest.
The bridge crosses a small stream and is used by walkers and livestock to access open forest land.
