Sustrans is a UK charity that works on practical and creative solutions to transportation challenges. It developed the National Cycle Network, which has grown from 500 miles in 1995 to over 13,600 miles currently, within 1 mile of 55% of the UK population. The network sees over 1 million trips every day and connects 365 National Trust properties. Sustrans also works on urban greenways and maintains the network through 3,500 volunteers and 3,000 rangers.