The roundabout is a symbol of British liberty
In my last article, I introduced you to the ‘paceometer’, which shows how the relationship between an extra unit of speed and the consequent saving in journey time is anything but linear. For any given distance, the time saved by increasing your speed by an additional 10mph may be immense or almost irrelevant depending on how fast you are travelling already (accelerating from 5 to 15mph cuts 80 minutes off a ten-mile journey; accelerating from 60 to 70mph over the same distance saves little over a minute). It’s a useful insight: avoiding slowness is a far more important element of time-saving than pursuing ever higher speeds. It helps us understand,
