Don’t let pup your dog ride in the front seat of your car. A sudden stop can cause him to go flying through the windshield. Keep him in the backseat secured with a doggie seatbelt harness system or in a crate.
Even in the back seat, don't let him hang out the window. Likewise, a sudden stop can cause severe damage, sending him flying. If he loves the wind - most dogs do - belt him next to the open window.
Amazon offers a doggie seat belt for $7.60, an investment in doggie safety well worth making.