I live right beside I-210, it is adjacent to my back yard. It is depressed about 30' with about 30-40' from the edge to my back fence, which is a 16' high block wall installed by the State of CA. This block wall is also on top of a 3' berm. Still with me? What I am trying to say is that the freeway is over a 19' high wall, with 30-40' distance, and a 30' drop.
About every two months or so, we hear a loud bang when someone has a tire blow out. Today was different. We were standing in our back yard about 30' inboard of that block wall when we heard a really loud bang, and a few seconds later a 1 1/2 x 2" square of truck tire tread landed at our feet. That's at least 60' of horizontal flight, and about 50' of height.
Consider this my application for the worlds record blowout.
Rick Potter