I was on the was to my in laws house after work around 11:30pm. I was traveling outbound on 376 toward Carnegie when my radio cut out completly. I found this unusual because at the time i was listening to tunein radio which is an app on my iphone and i had already lost and regained signal after i went thru the tunnel. So i looked down at my phone and it said buffering 3% so i waited and it never went past 3%. I went to put light a cigarette and as i looked up i noticed the light. There is an airport in the area so i thought nothing of it at first. As i continued to look at it i began to notice that at no point did the craft blink like a plane or helicopter. As time went on it seemed to slow almost to a stop a few times then continue on its path. The object looked to be a large triangle with 3 lights on the back and 2 lights on the side visible to me. The glow/blurr of the lights made it hard to even notice much of a surface but i believe it was a solid object not just lights in the sky. After a few minutes of it in the distance it started to disappear to my left and as i followed it out of view with my eyes i noticed the car in the left lane next to me was watching it too. We made short eye contact and he looked as confused as me about 15 seconds later the radio on my phone came back on which as right before the heidelburg exit. I am very familiar with aircraft military, commercial, and private and this is nothing i have ever seen before. If i had to compare it to an aircraft i am familiar with it would be the boeing X-45C drone. It was very similar in shape the light pattern was different and the drone does not have the ability to hover.