Wow! This is a true trad tick. Physical Graffiti starts with fun, but tricky face climbing which then leads to the cool overhang near the top with a zig-zag crack splitting the middle. A difficult exit over the roof holds many sequences; find yours.
The approach as described above is to follow the bolts on P1 of hit the highway, and then follow "tricky" face climbing up & left to the ledge below the roof crack - use this direct approach to climb the roof crack in a single pitch from the ground. The original climb actually has a separate first pitch: start by scrambling up the left side of the cliff, as if accessing the ledge to top-rope anastasia/classic crack - but instead of heading right to the ledge, start climbing straight up a corner & ledge system until you reach a single bolt under an overhang - then hand traverse right ~15 feet to reach the anchor & ledge below the roof crack. Belay up your 2nd from here before attacking the roof. This first pitch is ~5.7-5.8.