Winter Roadside Safety Tips: Staying Warm and Visible in the Cold

Jul 13, 2026 · 6 min read

A breakdown on a warm afternoon is an inconvenience. A breakdown on a freezing highway with snow blowing sideways is something else entirely. Cold weather changes what you should do, what you should carry, and how long you have before things get serious. Here is what actually matters when the temperature drops.

Cold kills batteries faster than anything else

A battery that is at 70 percent of its capacity on a summer day will happily start your car. The same battery at ten degrees Fahrenheit may deliver only 40 percent. If your battery is more than three years old and cranks a little slow, replace it before winter. It costs less than a tow and a lot less than sitting in a cold car at midnight.

Keep the tank half full

Two reasons. First, a bigger volume of fuel resists water condensation in the tank, which can freeze in the fuel lines overnight. Second, if you get stuck in traffic during a snowstorm or slide off a rural road, that fuel is what runs your heater. A half tank buys you hours of warmth. A quarter tank buys you a rough evening.

A real winter kit

Skip the pre-made "roadside kit" that is mostly a flashlight and jumper cables. In cold weather you want:

• A real wool or fleece blanket. Not a foil emergency sheet. Wool stays warm even when it gets damp.
• Hat, gloves, and a spare pair of socks. Cheap ones live in the car all winter.
• A small bag of cat litter or sand. Pour it under the drive tires for traction if you get stuck on ice.
• A folding snow shovel. The compact ones fit under the passenger seat.
• Hand warmer packets. The kind that activate when you open the pouch.
• A phone battery pack, kept charged. Cold drains phones almost as fast as it drains car batteries.
• Water and calorie-dense snacks. Granola bars, jerky, nuts. Rotate them out every fall.

If you break down in the snow

Stay with the car. It is more visible than you are, it blocks the wind, and rescuers look for stopped vehicles first. Walking for help in a whiteout is how people get seriously hurt, even when the nearest gas station "seems close."

Run the engine for about ten minutes each hour to warm the cabin. Before you do, get out and check that the exhaust pipe is completely clear of snow. A blocked pipe pushes carbon monoxide into the cabin, and that is the real winter risk, not the cold. Crack a downwind window slightly while the engine is running.

Tie something bright to the antenna or door handle, or turn on the interior dome light at night. It draws almost nothing from the battery and helps a tow truck find you sooner.

When to call sooner rather than later

In warm weather people sometimes wait an hour to see if a battery recovers on its own or a phone gets signal back. In winter, that hour matters. If it is below freezing, if you have kids or elderly passengers in the car, or if you are somewhere with no shelter, call dispatch the moment you know you are stuck. The sooner a tech is rolling, the sooner you are warm.

Related reading: what to do when your car battery dies and the essentials to keep in your car year-round.