The mark consists of the wording CARDIO BUS in black-outlined white lettering, with a blue line behind the wording depicting a heart beat ending with a large red bus shaped like a heart to the right of the words. The heart bus has two black wheels with white circles between the outside of the wheels and the gray middle portion of the wheels, which have black centers. The heart bus also has two black horizontal lines across part of it, and four white cut-out windows.