When a road is closed, why isn't the diversion route just the quickest way past the closure?
The one great attempt to make London’s streets logical - and how one retired chauffeur’s favourite routes changed the way you get around the capital.
Three roads were built in the space of 200 years, all trying to tame Rannoch Moor and Glen Coe. This is the impressive tale of one of Scotland's most memorable routes.
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