10 lanes! omg would I kill for that!
I will say part of my ability to drive 50-55 without issue is the state I live in. Generally WA drivers drive slower anyway. We have lower speed limits (60 in urban areas) and trust me, it is not uncommon at all to see people doing 60 mph in the far left lane or the HOV lane... (really sucks!)
The other reason I can maintain that speed easily is frequently my speed is less than that due to traffic. My drive to the office on I-5 funnels between the Nisqually Wildlife Refuge, the Nisqually Indian Reservation and the Ft. Lewis Artillery Range. there is no "going around" option.
After passing the mess aka as Main Gate; JBLM (Joint Base Lewis-Mcchord), I get to the Puyallup Freeway, then JBLM Main Gate; Mcchord, then the Downtown Tacoma Freeway. then the 167, then the 18 and so on. Each one causes traffic to slow down in the right two lanes (or more)
I cant tell you how many times I wished I could drive as fast as 35 much less 55. This is not an occasional thing. Ft. Lewis is a daily guaranteed thing, twice a day, EVERY day. When its bad; 5:30 AM there is a near stationary line that averages 3-4 miles long on I-5 waiting to get into the base.
My old neighbor worked on base. for a 7 AM formation, he said he had to be in that line by 5:30 AM to insure he was not late. He said one of the main reasons he moved to Olympia is because the I-5 Northbound line into the base was usually only 30-40 minutes instead of 90 minutes.
FYI; the funnel is only 3 lanes