"Ideal Conditions For Speed" - coming up Dam Neck Road out of the Naval Base near VA Beach, drafting behind a work van. I hit 57mph! The guys knew I was there and kept increasing the pace at a very steady rate until I could not spin any faster.
Real world? Any temperature, any road, anywhere... Time Trials don't wait for conditions to be ideal, so I just go like h-e-double hockey sticks and hope it's fast enough.