Open Travel-Time Maps of the UK

mysociety.org has produced some very interesting travel-time maps - for Cambridge, London and the nation as a whole. Future additions include relating journey times to housing price; adding travel cost data; incorporating reliability-of-transportation-mode data; and real-time web service, which would be tremendously useful as part of a trip-planning tool. Imagine something like this tied to every airline, bus, train and highway - with real-time construction, weather, and other data piped directly to it!  via oblomovka