Quote: jbuzza "I think it could be around £300 per month per cab but happy to be corrected.'"
I believe you are about right.
Ergo, 18,000 + design costs for 6 months and potentially between 900k and 1.8 million views PER DAY for 12 times the spend of 5,000 oyster cards SEEN BY THE SAME 5,000.
...........even if I am 90% wrong on the cab=eyeballs calculations, 90,000 per day over 182 days is 16,425,000 v 5,000 oyster cards.........