I never said I was smart.. IBA ride Saturday - updated with pix

[rodekyll]

I suspect they look at a lot of things -- time of day/night; slab or twisties; weather (maybe) and such along with bare speed. 

[charlie b]

That's the nice thing about doing the distance runs on this side of the Mississippi.  Speed limits are high enough to make a shorter duration of it.  And, towns are further apart so less worries about traffic.

[atavar]

You can get away with a large tolerance if you make sure and take your breaks *before* you gas up.  ten minutes of sitting will have a huge affect on your average. 

[rodekyll]

Hmmm.  Good strategy.  We did that, but it was because we could top off the tanks more if we rolled for the highway immediately.  Never thought of it as a way of slowing the recorded pace . . .