Low altitude Triangle shaped UFO over Luxembourg City , 3 white light 1 red light in center.Date : 1st February 2012 evening environ 20:30 Location : From my car on motorway A6 Luxembourg country , driving from west to east at average speed 110 Km/hour about 1 kilometer before "Croix de gasperich" (motorway crossing), and about 1 kilometer south of Luxembourg city. Weather: Frozen (environ -5°C) Dark blue crystal clear Sky UFO : Sharp (no rounded border of any kind) equilateral triangle, no tail, Deep black color (clear shape, very visible due to back dark blue sky ) 3 average sized white lights (would say 1/20th of triangle width) , 1 per triangle corner but not at the corner end.1 average sized red light at the center (quite same size as the 3 white lights) I would say 2 (or more?) small sized (can't determine the size) blinking white light near the center Triangle side length is at least 100 meters.UFO flight very low altitude (environ 150 meters above ground) flying straight from south to north going right above Luxembourg city (illegal way path for conventional airplane ) The object was almost right above me. (Object sight started at environ 45° angle from horizon front of me) the closest airport (Luxembourg Airport) low altitude airway is oriented south-west to north-east.The UFO Speed was quite slow (environ 1 triangle side length every 2 seconds : environ 50m/s ) I didn't notice any particular sound (No noticeable sound from inner car on motorway) Collateral : I often use this motorway at about same time (every working day evening) I often see conventional planes (A320 alike) the evening ,due the airport just few kilometers away.