New trains on the Ipswich to Cambridge line will now stop at Kennett and Elmswell thanks to a door system update.
Train services between Peterborough and Ipswich have been suspended until the end of the day due to a train fault.
The Met Office says in its yellow weather warning that some icy stretches are 'likely'.
The road has been closed since this morning and is expected to reopen in the next two hours.
New three and four carriage trains are replacing existing one, two and three carriage trains with one of the Swiss-built locomotives now in service.
Police are keen to find the driver of an articulated lorry who may be a witness to the collision.
The festive extravaganza runs until Sunday with thousands of visitors expected.
The Bury St Edmunds Christmas Fayre kicks off today (November 21) with a parade and fireworks.
Motorists in West Suffolk have been advised to expect disruption this week as roadworks begin on the A11 and A14.
Hope for improved access at Needham Market train station has been renewed following a Department of Transport bid.
There will be four additional services running in each direction between Ipswich and Bury St Edmunds on Sunday both before and after the fayre.