Charlotte Hall to Upper Marlboro 40 minutes and thats going Rt. 5 to 301. Ive taken all the back ways 381 and 382, and still find for the most part up 5 to 301 is the quickest. Too many slow pokes on 382 (alltough I just came that way to work nice day and had some time to kill, its a scenic route) and very few passing zones if you get caught behind one and too many places where the speed limit drops, easy pickings if the police run radar. As of 2pm there is a PG County Policeman running radar on Aquasco Rd from area of Horsehead Rd south to county line heard him calling out tag numbers on vehicles he had stopped them on my scanner I had with me when I just came up the road. (Watchout Speedy 70) LOL