Four electric buses will start running the City Loop from the first week of July.
The route will cover Adelaide Street, Wharf Street, Eagle Street, Margaret Street, Alice Street, and the Botanical Gardens.
It has an electric display that shows the next couple of stops and how long it will take to get there.
Electric buses will produce zero-emission themselves, and the 60 electric Brisbane Metro megabuses will also produce zero emissions, although most of the electricity they run on is produced from coal.