The first priority when your vehicle breaks down is to prioritize your safety and the safety of your passengers. Take the following steps:

Move your vehicle to a safe location, preferably off the road and onto the shoulder if possible. Turn on hazard lights to alert other drivers.

If your vehicle can't be moved, ensure you and your passengers exit the vehicle and stand at a safe distance away from traffic.

If visibility is poor or you're on a busy highway, consider using reflective triangles or flares to make your vehicle more visible to other drivers.

Contact a reliable towing service or roadside assistance provider as soon as possible. Provide them with your location, a description of the problem, and any pertinent details about your vehicle. Inform them if you suspect it's a more serious issue that may require specialized equipment or expertise. 

When speaking with the towing service or roadside assistance provider, ensure you communicate your location accurately. Be clear about any landmarks, street names, or nearby exits to help them find you quickly. Also, mention any special circumstances or challenges they may encounter while reaching your location. 

Listen carefully to the instructions provided by the towing service or roadside assistance provider. They may guide you on what to do while you wait, such as locking your vehicle, waiting inside a nearby establishment, or staying in your vehicle if it's safer to do so. 

Remain vigilant and aware of your surroundings while waiting for the towing service. If someone approaches offering assistance, use caution and rely on the professional assistance you've already requested. Avoid sharing personal information or accepting help from unverified sources. 

Before your vehicle is towed, make sure you take note of important details, such as the name of the towing company, the tow truck's license plate number, and the driver's name. This information can be helpful for future reference or insurance purposes. 

Communicate with your towing service. Ask questions.

Once your vehicle is towed, make sure you stay in touch with the towing company until the vehicle is dropped off. Remember to ask the towing company to send you photos at the drop off and keep you updated.