This isn't exactly from Ottawa -- but we have enough bike lanes here to make it somewhat relevant.
Pro-cycling ads poke fun at car potatoes: "Being pro-bike in NYC more or less requires you to be anti-car. This looks to be true elsewhere, judging by a new “Love your bike” ad campaign in Manchester, England, launched just in time for spring. Despite this billboard’s little..." (From AdFreak)
Related: Ottawa Bicycle Guide