Assuming you have a roof rack already installed on your vehicle, there are a few ways to secure a fishing rod to it. One option is to use tiedown straps. You can thread the strap through the eyelet at the end of the rod and then loop it around the roof rack. cinch it tight and ensure that the ratchet is locked in place. Another option is to use a rod holder. These holders can be mounted directly to the roof rack and provide a secure place to store your rods while you're driving. If you have more than one fishing rod, you may need to purchase multiple holders or use a combination of both tiedown straps and holders. Whichever method you choose, make sure that your fishing rods are secured before hitting the road.