Also remember that the 16 hour rule does NOT apply if the dispatcher new about the bad weather prior to you leaving the terminal. Here is the wording from the FMCSA.......Adverse driving conditions means snow, sleet, fog, other adverse weather conditions, a highway covered with snow or ice, or unusual road and traffic conditions, none of which were apparent on the basis of information known to the person dispatching the run at the time it was begun.
(b) Driving conditions -(1)Adverse driving conditions. Except as provided in paragraph (h)(2) of this section, a driver who encounters adverse driving conditions, as defined in §395.2,and cannot, because of those conditions, safely complete the run within the maximum driving time permitted by §§395.3(a) or 395.5(a) may drive and be permitted or required to drive a commercial motor vehicle for not more than 2 additional hours beyond the maximum time allowed under §§395.3(a) or 395.5(a) to complete that run or to reach a place offering safety for the occupants of the commercial motor vehicle and security for the commercial motor vehicle and its cargo.
This does NOT mean Dallas can jerk you around for 5 hrs and then make you extend to get home.