dnbreaks I'm calling BS on this. Using the two extremes of your example I calculate nowhere near a 15 minute difference

wtf ok math genuis

i drive  aprox 50 miles from ib to front gate at camp pendelton then driving on the base is about 13 miles 

63 miles right!

ok this is where the varable is in place if i drive the speed limt on the base which vary 35mph 45 ,55, 45, 35, 45 including the lights it takes 20 min to  get to work if i speed by 5mph i wont get pulled over so i increase my speed to 11 -15 mins.

20 min on base

40 min on highway at 65 = 1hour

10 -15 min on base

30 min on highway at 80-85, road rage cut your ass of without a signal (brake and slow down)=45 min (no accidents)= 45 min

so driving freeway with constant speed = 1hour

i have made it home in a half hour before but the freeway has to be empty 1200-300 am