Transport Scotland has today published the report which shaped a £650million investment to improve Scotland's flagship rail route.
The document by Jacobs Consultants identified alternative proposals which are allowing the Scottish Government and Network Rail to deliver almost all of the benefits of the Edinburgh-Glasgow Improvements Programme (EGIP) for 65% of the originally estimated cost.
Transport Minister Keith Brown announced publication of the report during a debate in Parliament this afternoon.
Mr Brown said:
"Good performance and record investment since 2007 has stimulated a resurgence in rail travel in Scotland. That's good for our economy, good for the environment and good for the travelling public.
"I announced on 4 July that we will electrify the core Edinburgh-Glasgow via Falkirk line, deliver the new Edinburgh Gateway Station with connection to Fife line services and deliver the electrification of the Cumbernauld lines in time for the Commonwealth Games.
"This represents a £650million package of investment in Scotland's railway infrastructure, rolling stock and service provision which will enable hundreds of new jobs and provide a major boost to the wealth of Scotland and its long-term economic sustainability.
"The Jacobs Review identified a new opportunity to deliver increased capacity by lengthening platforms as part of the Queen Street redevelopment.
"Transport Scotland is now working in partnership with Glasgow City Council, Network Rail and Buchanan Partnerships to make this a reality.
"As well as delivering faster, better, electrified services for passengers, this opportunity brings considerable savings and will meet passenger demand well into the next decade.
"We are determined to ensure that our rail programme is affordable and that we continue to drive the best value out of every pound we invest. We must therefore be ready to take advantage of every opportunity to maximise our investment in any way we can.
"I committed this Government to sustained increases in rail investment until the end of the decade. Any savings made will increase opportunities for investment elsewhere in the rail network.
"The Jacobs report on which these developments are based is being published today. This will, I hope, put to rest any concerns and speculation over the future of EGIP."
Mr Brown also announced that Conon Bridge railway station in the Highlands will reopen early next year for the first time in over 50 years.