The highway department workers were located at one end of the construction zone, within the first 2 miles of the zone. We drove 6 more miles and not one person or piece of construction equipment was in sight, not one. Not paying attention, our speed had slipped up to 71 mph in the group of 5 cars we were following on this bright, sunny day in light traffic. A highway patrol officer was at the exit end and pulled two of us over. This was not the norm elsewhere across I-70 clear to Nevada where construction zones were put up, if workers were not in sight the prevailing speed increased and no officers were sitting at the end to pull you over. Consider this a Highway Tax Zone in Kansas. Of course we are all about keeping the highway road workers safe, this was carelessness on our part but no life was in danger.