Turkey's high speed 'revolution'
25 August 2013 Last updated at 12:02 BST
Although railways are well-established in Turkey - its first train tracks were laid more than 150 years ago - until recently the service had a reputation for being slow, dirty and late.
Now the country is rolling out high-speed services and there are hopes that the investment will be profitable.
Jeremy Howell reports from the capital, Ankara.