The pay methods for delays in our center of approximately 100 drivers keeps going through changes. Since the pre-trip is included in our mileage rate pay, and we are not to be paid for any "unscheduled on property (hourly) work" until this amount of pre-trip time has expired; Question: What is the national average time allowed to pre-trip, what is suppose to be a tractor & trailer units pre-connected (all together) ready to go? Our management is saying this time is 18 minutes for doubles, and 17 minutes for singles. Management wants this unpaid pre-trip time to be as LONG as possible. It appears that we are now allowed to take a little over 16 minuntes to pre-trip a tractor, because they are only allowing 1 minute to pre-trip the second (single) trailer and dolly? Does not make since!