Politicians and campaigners in Cambridge are calling on the chancellor to lend his support to the city's underground scheme when he unveils his budget later this week.
The scheme, which would see a rail line connecting the north to the south of the city, is something that they say would ease congestion and contribute vast amounts to the economy.
If the plans go ahead it would make Cambridge the fifth city in Britain to have a rail network that runs at least partly underground.
It's estimated it would take six years to build.
Would cost £2.8 billion
It would have a fourteen mile core line running from Northwest Cambridge to the south of the city - a section of it going underground.
