Rory Sutherland Rory Sutherland

The test of time

issue 02 February 2019

In past years, I have been a critic of HS2. I might now change my mind. One simple tweak might make HS2 worthwhile — while saving the taxpayer most of its £60 billion cost. For this to work, all you need to understand is that 1 x 200 is not the same as 200 x 1. To put it another way, commuting is not commutative.

At present, all transport investment is driven by an economic model based on the purported economic value of overall time-savings for passengers. This, as David Metz shows in his excellent book Travel Fast or Smart? is a daft way to plan transport. Never mind that time spent travelling nowadays need be no less productive than time spent stationary: the model is dumb for a bigger reason.

By treating all journeys equally, it does not allow you to distinguish between one person saving an hour 200 times a year and 200 people saving an hour once a year.

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