Even the single family homes I buy for investment property are nowhere near multifamily as I don't want the cheaper competition right next door, and people who will pay for single family rentals usually want the space and neighborhood, not have all the traffic, noise, etc., from multifamily.

We've had decent traffic but no offers yet.

To a landlord of residential properties holding a house is simply holding inventory and inventory should be able to be moved and replaced to grow any business.An airport can change flight paths, bus routes can be changed, traffic patterns can change that increase traffic or make access more difficult, nearby zoning changes effect surrounding properties, there is an endless list of obsolescence factors that effect a residential property that can not be controlled.

I think I have some email traffic when we first asked him. 

We have a house that's been for sale since October, realtor is asking if we want to lower price again since the traffic has been slow lately.My initial thought is that it's just due to the time of year, so I'm thinking lowering price won't do much to bring people out into the freezing cold (Northern IL, Southern WI) anyway.

I then rented for regular price when traffic picked up.

It's simply done to generate traffic, what is available.

Traffic is traffic.

http://www.businessinsider.com/atlanta-traffic-jam-pictures-2014-1

This was on a busy street and a traffic light was installed at this time, with the light being about 15 feet from the front door, not an ideal environment for a rental.