I was driving home from Easter dinner. It was around 9pm approx.It was a very dark part of I-40 near Ludlow, CA . I was heading East.I glanced up (I was in the frint passenger seat) and saw what I describe as a neon bright blue, glowing similiarly shaped to a rainbow object. It was curved but not as extreme as what you would think of a rainbow to be.. a bit less curved. It was just hovering over the freeway..Im not sure how far ahead of me it actually was.. But from where I was it looked very large and extrenely bright and it seemed to stretch the entire witdth of the highway .. It mesmerized me..And, then before I could think to much about the detail of it all it just vanished.. It didnt fly away . Just vanished. I never saw it move.And then the next morning (today) I was driving my kids to school and I got a phone call from my husband who said he had been watching the AZ news and there had been a few reports of UFO sightings in Phoenix at the same time..Just a small dot of a blue bright lught .. but that was miles and miles away from where I saw mine.. I just found it a strange coincidence..