If you're planning a journey, you may find these links useful:

Rail
Live arrivals board information from South Eastern Railway
Live departure board information from South Eastern Railway
Live service information from London Underground

Buses
Timetable information from Arriva

Ferries
Latest channel crossing information from the Port of Dover

Air
Live departure/arrival information from all UK airports

Local Traffic Camera Installations
A full list of locations of traffic speeding cameras in Kent