A Liberal Democrat spokesperson said:
“Improving Britain’s roads is a massive priority for the Liberal Democrats. Nick Clegg and Danny Alexander have ensured that improving Britain’s infrastructure is at the heart of the Coalition’s agenda and the upcoming Autumn Statement.
“Liberal Democrats know the value of helping people get from A to B. For decades grassroots Lib Dem campaigners have fought to improve the roads and railways in their local areas and now that we are in Government we are able to do that on an enormous scale.
"That’s why we have delivered the biggest investment in the railways since the Victorian era, overseen a record investment in renewable energy and pushed so hard to improve Britain’s roads too.
“And we want to go further. That’s why we are the only party committed to borrowing to invest in major capital projects once we have balanced the books by 2018.”