rarely. i may like to cruise at 85-90, but when i see curves, i like to accelerate through them upto 100 and maintain that speed until traffic or safety forces me back down to cruising at 85-90. even though i travel the 5 freeway between san diego and irvine during non peak hours, alot of drivers think that going 80 in the fast lane is speeding. most likely they are going 65-70 since their cars can have as high 15% difference between true speed and odometer.