We've all seen cars with fishing rods sticking out of the windows and trucks with loose rods in the bed, tips raking across the top of the tailgate. The angler driving just hopes to arrive at his fishing destination with all gear intact. I got sick of carrying my custom rods in the bed of my pickup, so I built my own mobile rod holder from scrap lumber.
I cut two 14-inch-long pieces of treated 2- by 10-inch planks to form the top. To create two angled sides, I cut triangular pieces of 2- by 8-inch treated wood that measured 16 inches along the hypotenuse. I screwed the 2-by-10 pieces onto the triangular sidepieces with 3-inch drywall screws.
To hold the rods, I cut three 12-inch sections of 11¼ 2-inch PVC pipe and drilled holes through the pipe to secure each with screws into the wood. The holders are heavy enough that they don't slide around. But just to make sure, I used hook-and-loop fasteners to secure the holders to the bed liner.