Work to prepare Maidenhead train station for the arrival of Crossrail has already begun.
The new high-speed rail service is due to start running from 2018, with passenger numbers expected to rise from two million every year to three million.
A new site office and site compound is being built, which will be used as a headquarters for upcoming work and is expected to be completed within the next few weeks.
The construction of six new sidings is also underway, which will be used to house the increased number of trains expected to use the station.
But a spokesman from Network Rail, Chris Denham, said it will not be until late next year when real changes will be seen.
"There will be changes to the station, possibly a new platform, but at the moment we are not 100 per cent certain," he said.
"We do not expect any finalisation of the plans until next year."
The new rail service will enable Maidenhead passengers to reach Heathrow in 28 minutes.
UPDATE: Network Rail has announced further information on planned upgrades to Maidenhead train station ahead of the arrival of Crossrail in 2018.
The list of work carried out will be:
Work is expected to be carried out in 2014.
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