The spotting took place around 11:00 p.m. Wednesday when drivers first saw the craft being hauled on a flatbed truck on I-270, then on I-495.
Maryland State Police confirmed that the strange craft was actually a drone aircraft made by Northrup Grumman that was being transported from West Virginia to Patuxent Naval Air Station in Maryland.
It wasn't the first time aircraft being transported had been mistaken for 'UFOs'. Last year, residents of Cowley County, Kansas mistook a similar flying machine.
DefenseTech.org reported last year that engineers practice aircraft carrier take-offs and landings with the drone on a strip of runway at Patuxent that's painted to resemble a carrier's flight deck.