Metropolitan Transportation Authority Bus Time arrived in Brooklyn and Queens Sunday.
Riders can now get real-time bus tracking on every route in the two boroughs by smartphone, text or web.
This completes the agency's promise to have the system up and running on all of their bus routes during the first quarter of this year.
The expansion adds more than 9,000 bus stops to the MTA Bus Time system, bringing the total to more than 15,000 citywide.
Mechanics have now installed enhanced GPS devices in 5,500 buses across the city.
For more information, go to bustime.mta.info.