Directions to University of Houston

Coming from out of town, the simplest way is to use I-45 South.

See directions from the George Bush Intercontinental Airport (IAH) on this map.
On the campus map below, I-45 is the highway in the upper right corner; the first light on Spur 5 South is University Drive. Here is a map of this part.

The Hilton Hotel (for parking on Friday) is at entrance #1.

Directions to PGH

To reach Philip G. Hoffman Hall (PGH), it is easiest to park at the Hilton, and walk to PGH.
You should use the hotel parking on Friday.
On Saturday parking is free in all parking lots. E.g., you can use the one on the right as you enter the campus at entrance #1.

The talks will be held in 232 PGH.