Driving northbound on I-35E between Dallas and Denton, TX. Observed a plane ascending several miles away whose path crossed pulsating lights much closer and nearer to the ground. There were three alternating lights: one larger center light dimming while two side lights brightened.
The lights stayed in the same location as I drove by it. It was on the other side of the interstate about 1500 ft up. Thought it may be a helicopter but there was no flashing tail light, no flashing lights at all. Just the three lights that seemed to be on a stationary hovering object.
I felt it may have been a UFO if not a helicopter. I sought photos and footage of hovering helicopters to confirm the light arrangement and alternating pattern was not that of a helicopter.