The case for expensive infrastructure projects

We ask whether high speed rail links are worth the large sums of money they cost to build. There's concern that a planned $70bn high speed rail line in the UK may go way over budget. The chief executive of the HS2 line, Mark Thurston, responds to criticism of the project. And professor Germa Bel, an expert on transport and infrastructure at the University of Barcelona tells us about challenges that high speed rail has faced in Spain. Also in the programme, Indian prime minister Narendra Modi has won re-election in a landslide. Shubhada Rao is chief economist at YES bank and explains what five more years of BJP rule might mean for the Indian economy. Plus we hear about aviation regulators from around the world discussing when the grounded Boeing 737 Max should be allowed back in the air.

(Picture: Artist's impression of an HS2 train. Picture credit: PA.)