Christian Wolmar writes: Innovation ignored at our peril :

“One of the reasons for my scepticism about HS2 is on the basis that it does not take into account future development of technology. Just look at how technology has changed since 1993 when mobile phones had barely taken root, Google, Facebook and Twitter were but twinkles in their founders’ eye and digital TV was just starting. Will there really be enough people wanting to pile into what are likely to be expensive trains in 20 years time to justify the huge expenditure on this project?
And here’s where I stick my neck out. The next big technology, one with such huge implications that it is impossible to being to predict them, is driverless cars. Google, which is investing billions in the project, announced back in August that its fleet of more than a dozen driverless cars had completed 300,000 miles – ten times round the world – without an accident. The cars have driven through San Francisco and through various parts of California and Nevada – where a law has been passed allowing them – and while there are no plans to produce them commercially yet, their time will inevitably come.
Perhaps they will start by being driven only on motorways but even that would have enormous consequences. It would combine many of the advantages of train travel with the flexibility of car use. Think trucks, too. The economics of transport would change as radically as they did when the railways were first developed. The time frame may be a decade or two, but the consequences will be much more far reaching than, say, the much talked about electric cars. The driverless car – or rather motor vehicle – is the innovation that we ought all to be taking into account in our future thinking.”