As dog owners, we want our four-legged companions to join us on life's adventures, whether it's a quick trip to the park or a long holiday journey. However, transporting your dog safely requires more than just opening the car door and letting them hop in. Recent studies have revealed some alarming statistics: a dog weighing just 19 kg can develop forces exceeding 400 kg during a collision at 50 km/h, essentially becoming a dangerous projectile inside your vehicle.
A survey commissioned by Ford found that 32% of dog-owning drivers admit they don't properly secure their pets whilst driving. This not only puts the animal at risk but also endangers everyone in the vehicle. The good news is that with the right equipment and knowledge, you can ensure your dog travels safely and comfortably.

Understanding the Risks of Unsecured Dogs
When a dog is left unrestrained in a vehicle, several risks emerge immediately. During sudden braking or a collision, your dog can be thrown forward with tremendous force, potentially causing serious injury to both the animal and the vehicle's occupants. Even during normal driving, an unrestrained dog may become excited, anxious, or distracted, potentially interfering with your ability to operate the vehicle safely.
Beyond the immediate safety concerns, there are legal implications to consider. In the UK, Article 57 of the Highway Code specifically states that animals must be "suitably restrained" to prevent distraction or injury to the driver or passengers. Failing to comply could result in fines or even invalidate your insurance in the event of an accident.
Additionally, in emergency situations, an unrestrained and potentially frightened dog may hamper rescue efforts or escape from the vehicle, creating additional dangers on roadways.
Metal Dog Crates: The Safest Option

The TCS automobile club conducted comprehensive crash tests at 70 km/h using dog dummies attached to various restraint systems. Their findings were clear: metal dog boxes provided the highest level of protection in collision scenarios. These crates maintain their structural integrity during impacts, keeping your dog contained and protected from the more severe forces of a crash.
Several metal crates earned excellent safety ratings in testing, including the Schmidt Premium Kennel & Universal, 4pets Pro 2 – Large, and the Kleinmetall Vario Cage. These top-performing options typically feature robust construction, secure latching mechanisms, and crash-test certification.
When selecting a metal crate, ensure it's appropriately sized for your dog. Your pet should be able to stand up, turn around, and lie down comfortably. For safety and stability, the crate should be secured to the vehicle using manufacturer-recommended attachment points, preventing shifting during travel.
While metal crates tend to be heavier and more expensive than other options, their superior protection makes them the recommended choice for regular car travel with your dog.
Plastic Dog Crates: A Compromise Option
Plastic transport boxes received mixed reviews in safety testing. While they offer advantages in terms of cleanliness and maintenance, they simply cannot match the crash protection of metal crates. The TCS study found that plastic crates may deform or break under the forces experienced during collisions.

That said, plastic crates do serve a purpose, particularly for air travel. Models like the Capri Transport Box include features such as seatbelt fastening devices and ventilation slits for air circulation. The Eco Line Plastic Carrier, made from recycled materials, includes seatbelt clips for added security.
For occasional short trips where the risk of serious collision is lower, plastic crates may provide adequate protection. However, for regular car travel or longer journeys, metal crates remain the safer choice.
Mesh Cages and Fabric Boxes: Not Recommended for Car Travel
While mesh cages offer excellent ventilation, the TCS testing revealed significant safety concerns. The risk of injury from sharp edges and corners during impact is considerable. Additionally, these cages can fold under pressure, allowing the dog to slip out during a collision.
Similarly, folding fabric boxes performed poorly in crash tests. The fabric could not withstand impact forces, resulting in severe structural damage. These boxes also tend to soil easily and offer little waterproofing. When placed on back seats, they can significantly obstruct driver visibility.
Both mesh cages and fabric boxes are better suited for home use or stationary containment rather than vehicle transportation. For car travel, they should be avoided in favour of more secure options.
Dog Car Harnesses: Limited Protection

The TCS test results for dog safety harnesses were particularly concerning, with all six tested models failing their crash tests. Even the two highest-rated products (receiving "conditionally recommended" status) had significant limitations, particularly regarding leash length that could allow dogs to reach the front seats.
The remaining four harnesses performed dismally, with attachments failing under impact loads, allowing the dog dummies to fly uncontrolled through the vehicle interior. While harnesses do offer the advantage of doubling as walking equipment and don't restrict visibility, their safety limitations are substantial.
If you must use a harness, look for models specifically designed and tested for vehicle safety with strong attachment points and adjustable length. They work best for smaller dogs, where impact forces are lower, but should never be considered equivalent protection to a proper crate.
Boot Dividers: Appropriate for Larger Dogs
For estate cars and SUVs, boot dividers provide a practical way to separate your dog from the passenger compartment. Rigid metal grids that mount securely to your vehicle's existing attachment points offer good protection, preventing your dog from being thrown forward into the passenger area during braking or collisions.
However, it's important to recognise that while dividers protect the human occupants, they don't necessarily protect the dog from injury within the larger boot space. For optimal safety, the area should be limited to prevent excessive movement, and no loose items should be stored in the same compartment as they could injure your dog during braking or impact.
Always select dividers specifically designed for your vehicle model rather than universal options, as these will utilise factory mounting points for more secure installation. Avoid nets entirely, as they provide insufficient restraint and can potentially entangle or injure your dog.
Transporting Your Dog Safely: Best Practices
Beyond selecting the right restraint system, several best practices can help ensure safe and comfortable journeys for your dog:
For long journeys, start early in the morning when temperatures are cooler. This reduces the need for extended air conditioning use, which can create uncomfortable drafts for your dog.
Plan regular stops every 2-3 hours to allow your dog to stretch, relieve themselves, and have fresh water. This helps reduce travel stress and keeps them comfortable.
Never allow your dog to ride with their head out of the window, despite how much they might enjoy it. Flying debris can cause serious eye injuries, and the strong air currents can irritate sensitive ears and respiratory systems.
Always ensure proper ventilation, but avoid directing air conditioning vents directly at your dog, as this can cause discomfort and potential respiratory issues.
For very anxious dogs, consult your veterinarian about appropriate calming solutions before resorting to medication. Often, gradual acclimation to car travel with positive reinforcement can reduce anxiety naturally.
Legal Considerations for Dog Travel
When travelling with your dog in the UK, you must comply with Article 57 of the Highway Code requiring proper restraint. For travel within the EU, additional documentation is necessary, including an EU pet passport verifying rabies vaccination and microchip identification.
Some countries impose additional requirements. Finland, Great Britain, Ireland, Malta, and Norway require tapeworm treatment 1-5 days before entry. Certain breeds classified as "fighting dogs" face stricter regulations or entry prohibitions in countries including Germany, France, and Norway.
Young puppies under twelve weeks old are prohibited entry in many European countries including Germany, Italy, Norway, Finland, and Great Britain. Always research specific requirements for your destination well in advance of travel.
Choosing the Right Solution for Your Dog
The best restraint method for your dog depends on several factors including their size, temperament, your vehicle type, and the nature of your travels.
For regular travellers with medium to large dogs, a high-quality metal crate secured in the boot or back seat provides optimal protection. For smaller dogs or occasional travellers, a crash-tested harness may offer sufficient protection while being more convenient.
Estate car and SUV owners might find a well-installed rigid divider combined with a non-slip mat to be the most practical solution, particularly for larger breeds that need more space.
Whatever system you choose, take time to acclimate your dog gradually. Start with short journeys and use positive reinforcement to create positive associations with the restraint system and car travel in general.
Conclusion: Safety First, Always
When it comes to transporting your dog in a car, cutting corners on safety equipment isn't worth the risk. The extra investment in a quality restraint system protects not only your beloved pet but everyone in the vehicle.
Based on comprehensive testing and expert recommendations, we suggest prioritising restraint methods in this order:
- A properly sized and secured metal dog crate
- A rigid boot divider (for estate cars/SUVs) with limited movement space
- A crash-tested dog harness (primarily for smaller dogs)
By following these guidelines and best practices, you can enjoy adventures with your four-legged friend while ensuring everyone arrives safely at your destination.
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