Google has offered travel information in Maps for quite some time, but now it’s going real-time – in a handful of cities, at least.

The company has just announced that live public transport information has been added to Maps for Boston, Portland OR, San Diego and San Francisco in the USA, Madrid in Spain and Turin in Italy. Departure times for buses and trains will be updated in real-time, meaning that if your ride is late, you should know about it.

The service works on both desktop and mobile versions of Maps. In supported cities, when you click on a public transport station or plan a public transport route, you’ll now see “live departure times” (indicated with a special icon) and service alerts.

While the roll-out is currently only for a few cities, Google says it hopes to expand to cover more locations soon.