Changes

For heading south on the M11 (towards [[London]] and the M25 motorway, get the Trumpington park and ride service all the way to the end car park. From there it is about 5 minutes walk to a large layby where cars can stop (just before the roundabout) - I hugely recommend either having a sign saying London, or hitch on the southbound slip road, but it is quite a fast and dangerous place to hitch (nowhere for cars to stop).