As others have pointed out. If not in a rush, driving slightly under the speed limit is very relaxing.
At night I could part the red sea with it (people would just move out of my way if I was going like I was in a hurry) though.
Not having to take over is the best part of it.
Traffic, of course, approaches the bridge at 40+mph. Semi-regularly there's a police officer pulling people over and ticketing them.
I've begun entering the right lane, whenever possible, and setting my cruise control to a hard limit of 25mph. (Setting a soft limit of 25mph does nothing, as you coast up to 40 down that hill.)
When two lanes are open on the bridge, about 80% of the time when I reach the bottom of the hill at 25mph... I immediately have to slow, and sometimes stop, as the traffic on the bridge is slower. If there was a good bit of traffic with me, approximately 6 cars will have passed me on the hill, and be stopped ahead of me waiting for the bridge to clear.
If there is only one lane, the usual traffic pattern is that some people merge left as early as possible, and others will begin passing in the right lane, usually aiming to pass as much of the line of traffic as possible before merging. This typically leads to stop and go traffic, because as the left lane slows down approaching the bridge they lose any space for a zipper merge, and must come to a complete stop for the detectors to merge in at the last minute.
If I set my cruise to 25 -- the speed limit -- in the right lane, then after a few moments there aren't typically people zipping down the right lane ahead or behind me, and the merge typically happens at about 25-30 mph behind me as people pass me, and there's typically not any merging at 0 mph at the last minute.
About 80% of the time, by the time I get to the bottom of the hill, there's no one left in the left lane, everyone having passed me and zipped away, and I can merge without difficulty.
The failure mode here is that if traffic is significantly backed up in the left lane, either I have to zip past them at 25mph and merge at the last minute, being the asshole, or I merge earlier, into the slow-moving traffic, and abandon my traffic-shaping experiments.
We noticed that while commuting between two cities over the German Autobahn (A2). I could go 100 km/h and be in sync with the semis, or could go 120 km/h because at that time there are too many cars to go faster.
Going slower was almost two liters gas less per day but increased travel time by only 5-10 minutes.
But I do see the same effect going a mere 4 mph[1] over the speed limit.
1. I arrived at 4 mph over, because this was the usual answer when I've asked several police officers "How much over the speed limit to I have to drive for you to pull me over?". Their answer nearly always was "Up to 4 mph and you're okay."
So, you can be speeding, and yet still driving slower than the traffic around you, and you can be given two tickets -- one for speeding, and one for obstructing traffic.
Of the two, obstructing traffic is the bigger fine.