Driving north on 183 in Austin TX between 2200 and 2230 hrs, as I passed MLK and approached Loyola I noticed a grouping of lights off the west side of the highway over Little Walnut Creek Park. Thought it may have been a couple choppers at first cause planes coming in to land are always on the east side of the highway in that area. As I got closer to Loyola I noticed more lights like more of the object being exposed as my point of view changed. The object was stationary, emitted no noise from what I could tell, I was driving, and it just sort of hung out over the park. Looked to be twice the size of a Jet liner if it was a singular object and was T shaped with what looked like a row of 4 to 6 windows on the side facing me, really big windows, bright orange and yellow-white lights at the point, undercarriage and along the cross bar at the rear. It was T shaped as in capital T not lower case t, the bottom of the T was facing south and the cross bar north.Fairly certain quite a few other drivers saw it as well because traffic seemed to slow down in that area even though the highway was not crowded and there were no accidents. Saw a couple cars even slow down and pull off the road, so keep your eyes out, may be some video popping up soon.