Annie Mole's, webmaster of Going Underground, daily web log (blog).
If you like this you'll LURVE One Stop Short of Barking, THE fun and informative BOOK about travelling on the London Underground.
Well Dan Taylor @fabricoffolly has designed a mock up of his fantasy Tube platform indicator "which would not only show you exactly where incoming trains were on the line (and update their progress in real time), but also which carriages were more or less crowded (achieved by sensing passenger body heat or possibly carriage weight, to account for all those suitcases). That way, you could increase your chances of boarding and the platform announcers wouldn't have to keep telling new arrivals to move along the platform."
As Dan says "Go on TfL/CBS Outdoor - you've already got the screens..."
"The magic, mystery & sometimes maddening shortcomings of London's Tube are documented with love, enthusiasm & sometimes despair by its unofficial social historian." The Guardian