The Smiler is set to reopen in June next year after a review revealed last year's crash was down to 'human error'.
Alton Towers has confirmed that an investigation into the incident in June last year has concluded that the crash was the result of human error and there were no mechanical problems with the ride itself.
The theme park says they have implemented a number of improved 'safety measures' across all multi-car rollercoasters to ensure that an incident of this nature can never happen again.
"On re-opening, The Smiler ride will also incorporate an extensive set of new safety measures, including technical improvements and enhanced training.
An additional level of authorisation will also be added to the existing supervisory protocols to ensure that no manual override process may be completed without a senior member of staff authorising and being in attendance.
The technical improvements include multiple additional CCTV cameras and additional manual reset buttons around the track which require staff to inspect each individual section to verify it is clear before authorisation can be given to restart the ride."
Leah Washington and Victoria Balch, who were on the front row of the ride, had to undergo leg amputations due to their injuries. While Joe Pugh and Daniel Thorpe also suffered leg injuries.
Alton Towers say they continue to provide help and support to all of those who were on the ride when the incident happened and they have taken full responsibility for the incident.
The theme park is currently closed for its winter break.