File a grievance for harassment. (Article 37 Section 1(a) page 128 line 4) The Employer shall not in any way intimidate, harass, coerce or overly supervise any employee in the performance of his or her duties. 3 miles over is BS.
And an edit here: Any time I drive (I'm a preloader as my primary right now), I always go over what Orion wants as I run air first instead of running it with the route. Most of the drivers in our center do it. Other than that, I follow Orion as much as possible so long as I can stay safe. If they have a problem with me driving safe after being awake at 4:00 in the morning, they can go pound salt.