CBS Outdoor has shortlisted 13 entries for its London Creative Challenge and the winner will be announced on 24 July at the Grand Prix event, held in Battersea Park.
The final decision will be made by combining the results from the online vote and the views of a selected team of judges, who will view the creatives on buses at the Grand Prix event.
A spokesman for CBS Outdoor said it had asked agencies to come up with "the most engaging and innovative campaigns" for the bus ad medium.
Peter Charlton, national sales director, at CBS Outdoor, said the company launched the challenge to "get the industry thinking" about how they could creatively use the bus medium to get "maximum standout" for their client.
Shortlisted ad agencies include Saatchi & Saatchi, Nexus/H, VCCP and Euro London.
To vote for your favourite designs, go to www.upeveryonesstreet.co.uk.
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