Roadside-safety guides tell you where to stand and how far to move from the car. Dog-travel guides tell you how to pack for a road trip. Neither tells you what to do with the dog in the ninety seconds between “the car just died” and “I’m standing on the shoulder deciding what happens next.” That’s the gap this page covers: securing the dog before you open a door, the heat math of a stopped car in July, the leashed-shoulder protocol, and what roadside assistance and tow operators actually say about pets, which is less than you’d expect.
If your dog has already gotten loose near traffic, skip to If Your Dog Gets Loose now. Don’t chase.
Before You Touch the Door Handle: Get the Leash On First
The single most important step in this guide happens before you open a door, and it has nothing to do with the car.
A dog that’s calm on a normal drive can act completely differently once hazard lights start clicking, traffic noise gets louder, or you pull somewhere unfamiliar. Animal-rescue guidance is consistent on this: leash the dog before you touch the door, not after. A startled dog can dart through any gap the moment it opens, and a dog loose near a moving highway is now a second emergency stacked on the first one.
If your dog already wears a leash clipped and ready, or a harness with the leash point accessible without digging through a bag, that habit alone is the difference between a controlled stop and a loose-dog-on-the-highway situation. A crate or car harness helps too: a dog already contained can’t bolt the instant a door cracks open, which buys the few extra seconds it takes to get a hand on the leash.
Pulling Onto the Shoulder With a Dog Aboard
Once you notice trouble (a warning light, a shudder, a loss of power), the driving part doesn’t change because there’s a dog in the car. AAA’s general breakdown guidance is the baseline everyone should follow, pet or not:
- Signal early and avoid sudden maneuvers.
- On most roads, pull onto the far-right shoulder, as far off the traveled lanes as possible, on level ground if you can find it. On a divided highway with a median, the left shoulder can be the safer option depending on lane position.
- Turn on your hazard flashers immediately, especially if it’s dusk, dark, or the weather’s bad.
- Note your exact location: mile marker, exit number, or a landmark, so you can give it to whoever you call.
None of that changes with a dog in the back seat. What changes is what happens once the car has actually stopped.
Should You Stay in the Car?
AAA’s guidance leans toward staying inside the vehicle when you can get it clear of traffic: the car’s structure, airbags, and seatbelts protect you and a leashed, seatbelt-secured dog better than standing exposed on a narrow shoulder. If you’re off the travel lanes on a stable, wide shoulder, staying put with hazards on and calling for help from inside is usually the better call.
That changes if you can’t get the car far enough off the road, or you genuinely believe it’s at risk of being struck from behind. AAA is direct: if those conditions apply, don’t stay in the vehicle. That’s when the leashed-exit protocol below applies, dog included.
The Heat Problem Nobody Mentions Here
Roadside-safety guidance and dog-safety guidance both go quiet on this. Staying in the car keeps you protected from traffic. It does not stop the car from heating up once the engine, and the AC with it, is off, and July is exactly the month this matters most.
The AVMA’s published data on parked-car interior temperatures shows the rise happens fast, and it’s roughly the same curve whether it’s 70°F or 110°F outside:
| Time elapsed |
Interior temperature rise |
| 10 minutes |
About +19°F |
| 20 minutes |
About +29°F |
| 30 minutes |
About +34°F |
| 60 minutes |
About +43°F |
On a 70°F day, that’s an interior pushing past 110°F within an hour, and cracked windows make no meaningful difference, per the AVMA. A breakdown with the engine off is functionally the same heat trap as a parked car with the keys pocketed, except you’re sitting right there. If you’re waiting on a warm day, run the AC on battery power as long as it lasts, crack doors (not just windows) when it’s safe, lay a reflective shade across the windshield if you have one (it slows that curve, it doesn’t stop it), and get the dog into real shade the moment it’s available. A dog waiting through a tow call needs water access just as much as it needs shade, so keep a bowl and a jug of water within reach rather than packed away in the trunk. Full sourced temperature data and cooling gear lives on our heat wave and hot cars guide.
If You Must Exit: The Leashed Shoulder Protocol
If staying in the car isn’t safe, AAA’s guidance is to exit from the side facing away from traffic and move well clear, to a safe distance from the vehicle and roadway. AAA doesn’t attach a specific number of feet to that distance, but it’s worth sitting with as a mindset: a dog on a standard 6-foot leash standing right next to you isn’t actually clear of the vehicle, and neither are you, unless you deliberately walk farther than feels necessary.
A workable version of AAA’s protocol with a dog:
- Leash on before any door opens (see above), even in a hurry.
- Exit from the side away from traffic, dog included, never toward oncoming lanes.
- Walk well clear of the vehicle and roadway, not just a few steps. Whatever distance feels sufficient for you is the distance the dog needs too.
- Keep the leash short, a 2-3 foot working length rather than the full 6 feet, for actual control if a passing truck startles the dog.
- Don’t let the dog investigate the road or shoulder debris. Staying still and waiting is the whole job here.
What to Tell Roadside Assistance or the Tow Truck About Your Dog
This is the part where we looked hardest for a clean answer and didn’t find one.
We checked AAA’s own roadside assistance rules page directly. It covers vehicle eligibility, coverage limits, and service conditions in detail. It does not mention pets or animals anywhere. That silence is the answer: no published nationwide policy from AAA, or any other major provider we found, tells you in advance whether your dog can ride in the tow truck cab.
What we found instead, from owner accounts, is real inconsistency: some drivers let a dog ride on a lap without issue, others cite allergies or “no room” and won’t allow it, and the outcome depends on the individual tow operator, not a fixed rule from the auto club or insurer.
What that means practically:
- Call ahead when you request the tow and ask directly whether pets are allowed in the cab. Don’t assume either way.
- If the answer is no, ask about alternatives: can the dog ride secured in the towed vehicle instead, and is that actually safe given how it’ll be loaded.
- Have a backup plan: a friend who can pick up you and the dog, or somewhere safe off the shoulder to wait rather than counting on the tow truck.
Service animals sit in a different, legally distinct category. Federal ADA/DOT rules covering ground transportation providers, including taxi-like services, prohibit denying service because someone uses a trained service animal, per the ADA National Network’s transportation fact sheet. We didn’t find guidance naming tow trucks specifically, so we won’t overstate this as a guarantee, but the general legal framework exists and is worth knowing if a driver pushes back. It doesn’t extend to pets that aren’t trained service animals, which is exactly the gap described above.
If Your Dog Gets Loose
If a leash slips, a door opens wrong, or a dog panics hard enough to break free near a highway, the instinct to run after them is strong. Don’t.
Lost Dogs of America, whose guidance is built from tracking actual recovery patterns, is specific: never call, chase, whistle, or pressure a scared loose dog. Doing so risks driving it further away, and near a highway, that means toward traffic. Their documented pattern is that panicked dogs usually don’t go far: they bolt, hide nearby, and often creep back toward the original site once the noise settles.
If you spot the dog:
- Sit or crouch, face away, and avoid direct eye contact. Standing and approaching head-on reads as a threat.
- Toss treats gently rather than reaching. Most people give up too soon and stand to chase, which undoes the progress.
- Leave familiar-scented items (a worn shirt, the dog’s bed) near, but off, the road if you have to leave before finding them, along with food and water.
- Report it: local police non-emergency line, nearby shelters, and local lost-pet groups all raise the odds someone spots the dog and knows what they’re looking at.
Current ID matters most here. A dog wearing a tag with a working phone number, or a microchip registered to current contact info, closes a loose-dog situation in hours instead of days. Our pet emergency wallet card and pet travel document organizer tools cover that gap before you’re standing on a shoulder needing them.
Night Visibility: Being Seen Matters as Much as Being Careful
A breakdown at dusk or after dark adds a layer the daytime advice above doesn’t cover: whether other drivers can actually see you and the dog standing near the shoulder.
NHTSA’s pedestrian-safety research is blunt about the scale of this: pedestrians in dark clothing are detected very late, while pedestrians wearing good retroreflective material, especially on moving parts of the body, can be detected hundreds of feet farther away, even under low-beam headlights alone. NHTSA’s data also flags that a large majority of pedestrian fatalities happen at night, the same window a breakdown is statistically more likely to leave you stranded in.
None of NHTSA’s research is dog-specific, and we won’t pretend it is. But the physics don’t change by species: a dark-colored dog at knee height near a guardrail at night is genuinely harder to spot than a person, and a person in dark clothes is already a documented visibility problem. A reflective or hi-vis item on the dog, paired with your own hazard flashers and triangles if you carry them, addresses a real, sourced gap.