So, when in the car, always use a restraint harness for a large dog.

The size of the crate was never addressed in the post. You don’t want it to be too big. It should be just large enough for your dog to go in and turn around, and lie down and sit up. You should not think of it as a condo for your dog, but rather a safe place to be contained in the car during travel. If you plan to leave your dog in the car for extended periods, getting a taller crate so your dog can sit up without touching the top of the crate will make your dog more comfortable.

Dog Car Transport Box Aluminium Carrier Crate Puppy Pet Double Large Travel Cage | eBay

For pet parents seeking versatility and durability, this lightweight, large metal dog crate is perfect for home use and travel. Twin door latches keep your pup securely inside, and double doors make placement easy, whether you’re using the crate in your home, in the car, or while on vacation.

Dog Crates, Cages, & Kennels | PetSmart

Dog Crates For Extra Large Dogs Car Travel Cage Metal House Heavy Duty .. Note that the CPS tested wire crates and found them seriously lacking in vehicle crashes, saying, “Wire crates should be considered as distraction prevention tools and will not provide significant protection in the case of an accident.” The crate in the CPS test collapsed and did not protect or retain the dummy dog. So, when in the car, always use a restraint harness for a large dog.

The Best Soft Dog Crates - Summer 2017 | Dogs Recommend

KONG’s classic rubber toys can keep a pet entertained, engaged, and quiet in the car or in a hotel room. All you have to do is put food that your dog or cat likes inside the toy and hand it over. recommends a stuffed KONG for keeping a dog busy in a crate. No parts to pull off and swallow, no fluffy stuffing to inhale—and they’re virtually indestructible. And if you leave your KONG behind in the hotel room, or if it rolls out of the car at a rest stop, you can easily find a replacement at any pet store, large or small. Check out the for dedicated chewers (another Guide Dogs for the Blind recommendation) or the for senior dogs’ achy jaws and teeth.

If so, you may want to take a look into soft dog crates

It’s long been recommended that smaller pets travel in body harnesses or soft carriers that interface with a car’s shoulder belt, or in a travel carrier or crate, for larger dogs. Those options keep pets in place during normal driving, reducing distractions. And in case of an accident, it was believed they might reduce the likelihood of pet injury.A quick visual assessment revealed in short order there was no way they could possibly fit side by side in the back of our brand new Discovery—a car carefully chosen with a single large dog in mind—as we had hoped. We had no choice but to disassemble the unwieldy, airline-approved dog crates and place the pups on the back bench seat like bookends straddling our own smallish six-year-old human in his booster seat. The three of them wedged together were a sight: two somewhat bewildered and quiet (but huge) Shepherd puppies and one inquisitive and gleeful boy who could not keep his hands off either of them.Dog Travel Tip the First: Measure Your Car for a Travel Dog Crate Shiloh Shepherd puppies are huge; at four months they’re already a robust 40 pounds or thereabouts. And a mature Shiloh can tip the scales at around 150 pounds; think gigantic German Shepherd with a head the size of a bear’s. On the day we drove to Atlanta we were prepared with water bowls and and chew . But we did not anticipate the large size of the dog crates in which our “boys”—Teddy Blue and Merlin—had arrived. We also found the Fit suitable for spending half a day at a canine scenting trial. With Shadow — our German shepherd-husky-border collie mix — traveling on the backseat, we loaded the cargo area with a foldable soft crate, a foldable crate mat, two collapsible camping chairs, a small cooler, a medium-size carryall, a large reflective tarp (used to help keep vehicles cool during trials), a reflective windshield cover and a dog ramp. We still had room to spare.