Same here, when we have the rare luxury of 4 lanes each direction. Because Philly is a much older city, and most of the routes in are cut thru a hilly river valley, we more often have only 2 lanes with enough traffic to fill 4 - 6.
Out-of-staters are almost universally shocked or terrified, the first time they experience the Schuylkill Expressway, known locally as the Sure-Kill Deathway. It was already operating beyond its design capacity when they opened the first few segments in the 1960's, and it has gotten exponentially worse, each decade since.