Travelling With a Dog in a Car: Rules & Safety Guide

By Gumtree Editorial Team

28 July 2026 6 min read

Updated July, 2026
Your dog is part of the family, so it is only natural to take them on adventures with you. However, car journeys can be stressful for pets, and ensuring their comfort is essential. More importantly, understanding the legal rules for travelling with a dog in a car protects you, your pet, and other road users.

Whether you are heading to the local park or going on a long staycation, this guide covers UK Highway Code rules, safe transport options, and essential travel tips.

UK Rules for Travelling With a Dog in a Car

Before setting off, it is vital to know the law regarding pets on the road.

UK Highway Code (Rule 57): Dogs or other small animals must be suitably restrained so they cannot distract you while driving or injure you (or themselves) if you stop quickly.

Failure to properly secure your pet can lead to a charge of careless or dangerous driving, a fine of up to £5,000, and up to 9 penalty points. Additionally, driving with an unrestrained pet can invalidate your car insurance, leaving you unprotected in an accident.

How to Safely Restrain Your Dog in the Car

There are several approved ways to secure your dog while driving:

Dog Travel Harness: Harnesses come in various sizes and clip directly into the seatbelt socket. They are ideal for securing dogs in the front or rear seats.
Metal Dog Crate: Placing a sturdy crate in the boot or back seat keeps your dog secure and prevents them from pacing.
Pet Carrier: Best suited for smaller dogs, carriers offer a portable and enclosed space that helps anxious pets feel safe.
Boot Gate or Guard: If your dog travels in the boot, a dog guard prevents them from jumping over into the passenger cabin. Note: A guard should still be paired with a harness for complete crash protection.

Keeping Your Dog Comfortable and Calm

Motion sickness and anxiety are common when travelling with a dog in a car. To ensure a smooth trip:

Start Small: Introduce your puppy or dog to car travel using brief, low-stress journeys before attempting longer drives.
Prevent Motion Sickness: Travel facing forward whenever possible, and feed your dog 2–3 hours before departing so they can digest their meal.
Take Regular Breaks: Stop every 2 hours on long trips to let your dog stretch, go to the toilet, and hydrate.
Associate Cars with Fun: Build positive connections by driving to parks or woods rather than just taking trips to the vet.

Hot Weather Car Travel Advice

Cars heat up rapidly in warm weather, creating a life-threatening environment for dogs within minutes.

Travel During Cooler Hours: Drive early in the morning or late in the evening.
Maintain Airflow: Keep windows cracked slightly or set the air-con to reach the rear seats.
Use Cooling Accessories: Cooling mats and window sunshades help manage internal car temperatures.
Never Leave Your Dog Alone: Never leave a dog in a parked car on a warm day, even with the windows cracked or in the shade.

Planning a European Road Trip?

Driving across the Channel or heading into Europe with your dog involves extra requirements, including Animal Health Certificates (AHCs), rabies vaccinations, and tapeworm treatments.

Read our full guide to Travelling Abroad With Your Dog for everything you need to know before driving overseas.

Dos and Don’ts of Travelling With a Dog

Do	Don’t
Restrain your dog using an approved harness or crate	Let your dog hang their head out the window
Carry fresh water and a non-spill bowl	Feed your dog immediately before setting off
Turn off passenger airbags if placing a harness in the front	Leave your dog unattended in a car
Ensure microchip and collar ID tags are up to date	Allow your dog to sit unrestrained on a lap

FAQs

Can a dog sit in the front passenger seat?

Show

Yes, as long as they are securely restrained with a safety harness. However, if your dog sits in the front seat, you must disable the passenger airbag to prevent severe injury in an impact.

How often should I stop when driving long distances with a dog?

Show

Plan to stop every 2 hours for short walks, water, and toilet breaks.

Ready for your next family road trip? If you need plenty of space for crates, luggage, and passengers, take a look at our guide to the The Best Family Car s with Big Boots.

View all Expert Advice