Driving on tweedsmuir av east at a speed of 40km at around 7:05pm, my son( passenger) noticed a triangular shape object flying parallel to ours car on the right side (south) and flying at about twice our speed. sighting last about 12 seconds. we saw 6 white lights reflecting on a dark grey triangular structure, 2 on each corner and a red flashing and moving light underneath on a dome in the middle. no sound and flying still at very low altitude in about 0.5 mile south of us than speed up, while we keep driving slowly up to laurentian dr. we lost sight of the object because the street has 40 to 50 feet high trees on the right side.