An impressive demonstration of the capability of CBTC technology showing the value of displaying important information in real-time on the Web. But Muni's CBTC has closed proprietary interfaces making it necessary for Muni to focus a web cam on a digital monitor. This demo site displays Muni's LRT system operating in real-time on surface streets. It uses GPS and a commercial CDPD radio network. This system uses more open technology including Java and directly interfaces position data to IP and the web.
All digital technology obviates the problems above.
Note the much sharper images and more efficient data transfer. Clearly things are moving in the right direction. Unlike the above links, this link allows you both to monitor AND control devices using your web browser. All devices controlled monitored and interconnected in this demo conform to published LonMark Profiles. NYC Transit's new CBTC, for example, will interface with new trains that have serial trainlines using LonWorks and LonMark devices.