The historic road trip turns 100 this year, but Laura Millar recommends lesser-known highways to see the best of the US Get Travel Insider with Simon Calder. A newsletter packed with tips, deals, inspiration, and the latest travel news Get the Travel Insider newsletter with Simon Calder Get the Travel Insider newsletter with Simon Calder Email * SIGN UP I would like to be emailed about offers, events and updates from The Independent. Read our Privacy notice R oute 66 turns 100 years old on 11