Using a smart phone or other mobile device with Internet access, riders can go to m.metro.net and click on the Nextrip link to track buses and get updates on arrival times for each bus stop.
For those who can't surf the Web from their phones, a text message with a bus stop number can be sent to 41411 and Metro will send updated information about that bus.
"We are able to track the buses along their way and give updated arrival times every two to three minutes for every bus stop in our network," said Robin O'Hara of the MTA.
The MTA has a network of more than 15,000 bus stops throughout Los Angeles County.
"It's pretty good. If the new system you can check it, if I know my bus is going to be late I can switch to another one," said Jiping Yuan of San Grabriel.
Officials say Nextrip has been up and running for the last two months and more than 100,000 riders have used it.
"Traffic happens, accidents, construction happens and those cause delays and the vehicles in our fleet and the average rider wants to know if it's going to be three minutes late or four minutes late," said Al Martinez of the MTA. "They want to know when their bus coming."