I didn't know if that was what you were looking for. I was just being a smarty pants. I never travel but I happened to drive past it yesterday, I have been waiting years for an opportunity to use it and you gave the perfect setup, amazing.
I did used to drive a Detroit 2 cycle, but it was a DDEC 2 so it behaved a lot like any other engine what with the torque they programmed into it. It would pull down to 1400 and it was happier there.
I always figured it was called the "hammer lane" because the accelerator bears some vague resemblance to a hammer and if you wanted to go faster you would "drop the hammer" and then you would be passing traffic so you had to drive in the "hammer lane". Maybe there is more to it than that? Like putting a hammer head on the pedal to hold it against the governor as fast as it would go? On the old trucks I drove that was usually set by gearing and engine governor to 56 mph so it would have been a relatively safe thing to do.