Welcome back to another episode of Secrets of the Motorway. Today we look at the M11 that runs from Woodford in London to Girton near Cambridge. What secrets will we uncover on this 55 mile journey... secret junctions, forgotten service stations, ghost slip roads and abandoned motorways, it's all going on. In this series we aim to explore what our motorway network is hiding. As we drive along at the 70mph..ish...we simply just wouldn't be aware of what we're missing. This series aims to uncover some of the hidden secrets our motorways have to offer.