"Ciaran Meyers, a postgraduate student at Leeds University's Institute for Transport Studies, hopped on his Marin Mill Valley hybridwith a camera mounted on it to measure passing distances.
On a 50mph section of the A6, north of Preston in Lancashire, the readings found that motorists, on average, gave Ciaran an extra 18.1cm of space where there was no marked cycle lanecompared to when there was. On a 40mph section of the same road the difference was 6.8cm, whereas on the 30mph section it was down to 3.7cm, seen as not statistically significant."