For a long time, when asked about the need to reduce the environmental impact of aviation, my stock answer would be that transferring shorthaul flights on to high-speed rail services should be an obvious aim for governments. Yet, the more I have learnt about this governments high-speed two proposals, the more I have felt that it would be a very poor investment indeed, whether measured on economic or environmental grounds. Yes, having high-speed trains would shift some people from shorthaul flights onto less polluting rail services, but it has to be remembered that this big switch has already been largely made, especially on flights from London to Leeds, Liverpool and Durham Tees Valley, which no longer operate.
So if high-speed 2 is a bad investment, what would be a better investment? Obviously, any comparison between rail and air travel is about longer distance intercity journeys, whereas the vast majority of journeys take place within built-up environments, or are commutes between outlying towns and city centres. What if all the money collected from air passenger duty was actually put towards genuinely environmentally beneficial projects? Few things are better for the environment than high-quality off-road walking and cycling tracks, using existing historic transport corridors, especially disused railway lines. Yet, this can be done for a fraction of the cost of building new ones — the figure quoted by cycling charity Sustrans is that new cycle paths can be built for around £200,000 per mile, compared to the £155,000,000 per mile cost of high-speed 2.
Now, can these really be comparable, when high-speed 2 must surely carry far more people at much higher speeds? Yes, it might well do, but its entire business model is based on very ambitious estimates of user figures. Why put so many billions of pounds into such an inherently risky project? Whether high-speed 2 is viable or not (and we are certainly in the no camp), investing in better facilities for pedestrians and cyclists would still provide a much quicker win, both in terms of transport and human health.