Would anyone know if these are any good? Not exactly a high test model, but it might help.
http://www.walmart.com/catalog/produ...uct_id=4744711
I was at Costco yesterday and saw them for $89...seemed like a good idea for me as I have a long trailer. I'm not the guy that's going to run a wire all the way under the belly to have this.
If it isn't any good for backing (I wouldn't rely on it anyway), I would like it for going down the road to see if anyone is riding too close to me. If sure the rest of you experience the other drivers that come right up on you and then pass. Poor time for us to be changing lanes.