London Overground Network, circular design. Hover or tap the line will highlight it in blue. On mouse-less device, this effect can be canceled by tapping the empty background.
Own work (Original text: I created this work entirely by myself.)
User:Briantist BRIANTIST  User talk:Briantist(talk). The original uploader was Briantist at English Wikipedia.
2015 complete rework by Sameboat