Early morning sunrise, south side of Hwy 18.

I was driving East down Highway 18 looking at the morning sunrise, as traffic slowed and then came to a stop. I looked over south into the sky and saw a bright light that looked disk shaped with another lower rectangular shape below it moving slowly. The bright light seemed very abnormal with the contrast of the clouds and sunrise. I immediately pulled off the Hwy, took an initial photo on my phone, then tried to refocus to identify the object better, and it was gone.