Nice Idea!
Did you explain to your driver what #Steemit is too? Just in case when customers might ask him "What's this Steemit stuff about?".
You should check out @arcadecity, it is a decentralized "Uber" in the making and should be available by the end of the year. That could save you all those extremly high fees that you have to pay Uber at the moment.
RE: First Uber spreading the word about Steemit!