This was way back in 1983 when this sighting took place. The saucer was sighted south from St. Louis as I was moving toward Dallas Texas( highway 40 something?).I was driving with my glasses on the dash as I spotted what I thought was an airplane in the upper right hand corner of the window. I looked away thinking it was nothing. Something strange about the object must have registered in my head because I did a double-take to reinvestigate. The object descended until it was no higher than the telephone poles lining the highway and was in plain view from my passenger window and no more than 100 feet away.I stopped the car and rolled down my window to insure there would be no reflections in the glass to impede an objective assesment of what I was seeing. I also slipped on my glasses for a clearer view. The object made no sound whatsoever which was particularly note-worthy as the craft was clearly metallic and what appeared to be quite substantial in weight. This was no ball! oon. The craft moved north while following a perfectly parallel synchronicity with the telephone poles and the ground.It was moving no faster than 15-20 miles per hour so I had a perfectly clear view. Its lack of sound and perfect smoothness and machine-like precision were quite remarkable. I knew, even as I was seeing it, that this was something never seen on the 6 o'clock news. As it kept moving north and became more distant, my memory is unclear as to how it left the scene.It was a good quarter of a mile away when it seemed to just disappear. I have a vague recollection of it ascending in the same fashion as it descended,but that may be only my mind filling in the memory gaps.