Paying the way for a better cab ride

In Chicago you will soon see more advertising on cabs. But before you locals get grumpy about this and lament how it's so New York, consider this piece of info from a Chicago Tribune article:
"The advertising revenues should help cab owners pay for technological improvements required by the city, including the addition of satellite navigation systems in all vehicles by next year, he said. As well, large-fleet owners are being asked to add hybrid vehicles and more wheelchair-accessible vehicles to their operations."
Let's hope the pressure is applied to help the taxi companies follow through on this.