Transport for London's award-winning Journey Planner is free and easy to use. Here you can get all the information you need to plan a journey directly to any location in Greater London.
It covers all modes of transport and includes up-to-the-minute information on delays and route changes.
You can also sign up to alerts and weekend-closure-emails which warn you on Wednesday of closures on the following Saturday and Sunday using Travel Tools.
As well as browsing TfLs maps you can check bus routes using their bus maps and tools.