No offense to you, i know you wont take it that way anyways… but your reply was one way then the next.
The entire road has a speedlimit. Actual speeds people are traveling are irrelevant. If people feel the need to press their luck speeding so be it. Its a matter of following driving laws and courtesy. (both speeding and lane hogging) Right lane is the driving lane. Anything left is a passing lane. Book says, make the pass then yield safely back into the driving lane as soon as possible. Its as simple as that. Hell you could make it 55-50-45mph in a 55mph road for your example. Anyone left of the 45mph “lane” (10 UNDER the limit) would be impeding LEGALLY operating traffic, by not yielding back into the driving lane after overtaking a slower (yet still legally speeding car). +/- 10 mph is a decent chunk… something coming around a turn and being surprised with that difference in speed with might spell disaster, and nobody is traveling above the posted limit. Yet, that incident would be caused by someone ignorantly driving in the wrong lane.
I assume you dont like being stuck in traffic any less than everyone else does. Regardless of what your cruise control is set to, or your patients level is behind the wheel. But when you are doing exactly what other less capable drivers than yourself are doing, that causes the daily problems on the roads… its kind of like kicking yourself in the nuts isnt it.