Network Rail has confirmed it has the money to pay for a £700 million pound package of improvements to train services around Bristol.
It includes station upgrades at Temple Meads and Bristol Parkway, and building extra tracks at Filton. There will be capacity for more than 3000 extra seats for passengers during the rush hour.
The main railway line between Taunton and Tiverton is to be closed for three weeks in the new year for repairs.
Network Rail is to spend £15 million upgrading the line and repairing a Victorian tunnel. Replacement coach services are planned along with extra car parking.
The closure is due to start on January the 18th and will last until February the 10th.
A level crossing where a man from Warminster and a man from Wells died is expected to be replaced with a bridge.
They were among seven who died after a train derailed in Berkshire in 2004. Network Rail is expected to announce the replacement at Ufton Nervet as part of a rail electrification scheme.