The contest was originally meant to be held last year but was delayed due to the pandemic.
Key features include a -through design, air-conditioning, wider doors and increased passenger capacity.
The scheme will see nine new buildings constructed on a 3.6 hectare site spanning from Acton Town station in the north to the level crossing towards Chiswick.
London’s new Direct Vision Standard assigns vehicles a star rating based on how much the driver can see directly through their cab window.
City Hall and Transport for London have published full details of the upcoming fares increase.