As i was driving west on interstate 80 in vallejo, california, i saw what at first appeared to be a shooting star originating from the east and traveling west across the highway. it was much larger than a normal shooting star. it was also blue, bluish white, and luminous. the tail was prominent being wide and bright but not too long in length. it passed behind an overhead bridge and disappeared beyond the horizon. the entire sighting lasted less than 5 seconds. i pulled off the highway and drove up a hill to where i had a clear view of that section of sky but i saw nothing abnormal. when i returned home approximately 25 minutes later, i observed a helicopter flying over 80 west toward the same direction in which i saw the object.