cylander shaped flying object flying low with blue lights coming from bottom.

I was driving home from work at about 10 P.M., when I saw a very bright, white light in the sky.  At first I thought it was a star or one of our planets in Earth’s view but then it started getting closer.  I rolled down my window and looked up as it was flying into my line of vision. It had a red light flashing every few seconds as a normal airplane would, and it sounded like a helicopter.
I thought it was a helicopter until it passed directly over me and I was completely shocked. The flying object looked like a missile or a spaceship.  It was cylinder shaped with no wings, and appeared to have blue lights on the bottom.
It was flying lower to the ground than an airplane would fly in a residential area.  I would estimate it was flying at about 150 to 200 mph.  (It was traveling slow enough to make the object out.  It wasn’t just a blur.)  
I’m certain this unidentified flying object was not any commercial airplane or helicopter.