incresing the speed is rarely the problem. most freeways were designed for 50’s era cars to be able to travel that fast.
the problem is people travelling at different speeds. those stupid greenie hybrids are my biggest fear on the highway- they tend to drive well below the speed limit and cause rapid lane changes, other vehicle to slam on their brakes and general traffic backups.
Actually, the real problems are lane discipline, lack of situational awareness and lack of use of signals when changing lanes.
Slower traffic keep right.