Very OLD sighting of glowing blue object hovering over RR tracks/wires in SW Connecticut. 1967!

I am entering a very old sighting now, because until today I had nowhere I knew of to report the sighting which has affected me since it happened, almost 40 years ago. 
I was 17 years old. This occurred on a late October early evening in 1967.  I was driving in a convertible car with a fellow on our way to a party.  It was just past dusk, I'd say around six thirty or so. 
We were driving on a town road past a park where the railroad tracks run parallel to the street but up a hill.  As we approached a steep hill running alongside the tracks we saw a huge disk hovering over  the tracks and the electric wire towers.  It is difficult to determine size because we couldn't determine how close it was to us or the wires.  It seemed to be 20-30 ft long.  It was blueish in color and seemed translucent.  Small, evenly placed square or rectangular windows lining the front edge were visible to us.  There was absolutely no noise or flashing lights.  The front edge appeared to be about 50 ft from us and about 30 ft up from the street level. 
As the two of us started to point and shout about what we were seeing, in a flash it took a quick jolt westward and then took off that direction so quickly that it could not be tracked.  We sped up the hill in front of us to try to follow but saw nothing.  
Over the years I have been tempted to undergo hypnosis to ascertain if there had been any further contact between myself and the UFO that evening, but I was afraid to learn anything new.  I was already affected by the sighting and didn't want to become obsessed with it. 
About 15 years later I happened to see the fellow I was with that evening and the first thing we both said upon our chance meeting was "Did that really happen?"  So I know that he was similarly affected. 
Years later, in the late 1980's my then husband and I had a sighting in the evening skies, but that was simply lights seemingly flying in formation, again soundless, and then suddenly disappearing.  This occurred over Norwalk, CT in the late '80's, not sure of exact dates.  We did not report anything. 
I realize that this report is long after the fact, but it is important to me to have some record made of this sighting.  I would love to be contacted by anyone else who might have had a similar sighting at that time in SW CT or Westchester County, NY, area.
Witness indicates that the date of the incident is approximate.  PD