SIRI Implementation is Oslo, Norway
MTA Bus Time is a pilot project of the MTA, currently taking place on
the B63 route in Brooklyn.
MTA Bus Time uses GPS hardware and wireless communications to track the
real-time location of buses. The system is accessible via a
desktop web map, a mobile web site on iPhone, Android or other smartphones, and
via SMS text messages on all mobile phones.
For real-time information on the M34 or M16 routes, please go here.
MTA BusTime pilot project (http://bustime.mta.info/).
You can read all about it
It's only a one-route demonstration project, but the MTA has ambitious
plans for real-time bus information (about 1,000 more buses this
year). MTA will be evaluating SIRI as a standard both for exchange of
information internal to the system and with the public application