Don't need no stinkeen speed limit.
The I-90 tunnel from Seattle across Lake Washington has a single lane right hand section of tunnel. I was driving the wife's MR2 and I thought it would be a good place to see what it could do. At mid tunnel I hit 105 mph and slowed to almost the speed limit by the time I exited. (There was no one else in the tunnel)
I felt like Luke in the X-wing flying down the channel on the Deathstar to drop one for the Rebels.
Hmm, I'm not alone