"Dan" wrote in message
om...
Has anyone ever heard of a device that you can place at your business
and it will tell you what radio stations people are listening as they
drive by? Sounds crazy but i think there might be such a thing.If
anyone has any info please post it or email :
thanks alot!

http://www.mobiltrak.com/ shows the only existing commercial system; it only
gets a read on FM, however.