Ask YC: Is this a good idea?

I've had this idea for about 2-3 years.

In a single sentence: It's google adwords for the real world.

Let me explain: Two types of users: Realestate Owners (RO) and Publishers. An RO will login to a website and enter details about their physical location (where they live etc...). Based on traffic patters calculated automatically, they get assigned a score. This determines how much traffic (cars and pedestrians) go past that location everyday.

A publisher would then login to the website and search for locations they would like to advertise. They choose a location by any number of factors (score, street name etc..) and can put in a bid to advertise at that location.

The RO can then login and accept the bid. After the bid is accepted, the publisher would then send over a mini-billboard that the RO would place in his front yard for everyone to see.

This would not only just work for houses but will also work for cars - if a person travels long distance everyday, then they can get some money back by putting a stickers advertising a product.

I have done minor research on this and it looks feasable.

The way we make money is by takings a percentage of the agreed price between the RO and the publisher.

What does the HN community think?