Roadside Emergency Kits

Four organizations publish vehicle emergency kit recommendations. None of them agree on exactly the same list, which is informative in itself: the right kit depends on context, not on a single checklist.

Ready.gov (FEMA) lists jumper cables, flares or a reflective triangle, an ice scraper, a car cell phone charger, a blanket, a map, and cat litter or sand for tire traction as the vehicle-specific extras on top of a standard household emergency supply kit.¹

NHTSA recommends a cell phone and charger, first aid kit, flashlight, flares and a white flag, jumper cables, tire pressure gauge, jack and ground mat, work gloves and a change of clothes, basic repair tools and duct tape, and water.²

The National Safety Council adds a properly inflated spare tire with wrench and jack, a reflective vest, a fire extinguisher, a compass, nonperishable food, and warm clothing. They recommend checking your kit every six months and replacing expired items.³

The American Red Cross recommends a storm and severe weather car kit with survival supplies including gloves and hand warmers, an emergency Mylar sleeping bag and blanket, food, water, a light stick, a first aid kit, and a rain poncho.⁴

The overlap tells you what is non-negotiable: a way to signal (triangles or flares), a way to see (flashlight), a way to call for help (charged phone), a way to handle a dead battery (jumper cables or a jump starter), basic first aid, and enough water and warmth to wait safely. Everything beyond that core is climate, distance, and household specific.

Visibility: warning triangles and vests

Reflective warning triangles are the most effective way to alert approaching traffic to a disabled vehicle, especially at night and around curves. FMVSS 125 (49 CFR 571.125) sets the federal performance standard for warning triangles: each side must be 17 to 22 inches long and 2 to 3 inches wide, with both fluorescent orange and red reflective material on both faces.⁵ Triangles marked DOT must meet this standard. The standard also requires that triangles remain upright in wind gusts, which eliminates the ultra-lightweight plastic versions. A set of three DOT-compliant triangles in a hard case runs $15 to $30.

A high-visibility vest makes you visible when you step out of the vehicle. The NSC and Red Cross both recommend one. An ANSI/ISEA 107-compliant Class 2 vest provides 360-degree visibility and costs under $10. Keep it on top of the kit, not buried underneath.

Power: jump starters vs. jumper cables

Traditional jumper cables require a second vehicle and someone who knows which terminal goes where. They are reliable, have no battery to maintain, and cost $20 to $40 for a quality 10-gauge set at least 12 feet long. Shorter or thinner cables struggle with larger engines and longer reaches.

A lithium jump starter eliminates the need for a second vehicle. Modern units the size of a paperback book can start a V8 engine multiple times on a single charge and double as a USB power bank. Prices range from $50 to $150. However, lithium-ion batteries carry real storage considerations. The U.S. Consumer Product Safety Commission has issued multiple recalls for portable lithium battery products that can overheat and cause fires.⁶

If you keep a lithium jump starter in the vehicle: store it in the cabin rather than the trunk during extreme heat, keep the charge between 40 and 80 percent for long-term storage, recharge it at least every three months, and choose a unit with built-in reverse polarity protection, short-circuit protection, and overcharge protection. Many households carry both: a jump starter for self-rescue and a set of cables as a backup that never expires.

Tires: inflators and sealant

Many vehicles built after 2010 no longer include a full-size spare tire. Some carry a compact spare; others carry only a tire inflator and sealant kit. Before buying any tire-related gear, check what your vehicle actually has. Open the trunk or look under the cargo floor.

A portable tire inflator that runs from the 12-volt outlet fills a low tire in five to ten minutes and costs $30 to $70. A built-in digital gauge eliminates guesswork. Choose one rated for at least your vehicle's recommended tire pressure (typically 30 to 35 PSI for passenger cars; check the driver's door jamb sticker). If your vehicle carries no spare at all, a tire sealant canister handles punctures in the tread but not sidewall damage. It is a temporary fix to get you to a tire shop, not a repair.

Escape: the tool you hope to never use

A vehicle escape tool combines a spring-loaded window breaker and a seatbelt cutter in a device the size of a marker. It exists for submerged or burning vehicles where the doors will not open and the seatbelt will not release. Mount it within arm's reach of the driver's seat, not in the trunk. A tool in the glovebox or clipped to the sun visor is reachable. A tool in a bag behind the rear seats is not. Quality units cost $10 to $20.

The most common failure in a vehicle emergency kit is not a missing item. It is an item that was there but no longer works because nobody checked it. Dead batteries in the flashlight. Expired food. Water bottles that split in a freeze. A jump starter whose charge drained to zero over twelve months. Chemical hand warmers past their expiration date.

The second most common failure is placement. A window breaker in the trunk does not help when the car is in water. A first aid kit under three bags of groceries does not help when someone is bleeding. Kit organization matters: put the items you need fastest on top or in a separate pouch, and mount the escape tool where the driver can reach it without unbuckling.

The third failure is size. Pre-built kits often include miniature versions of critical tools: a 4-inch flashlight with a button cell, 8-gauge jumper cables that are 6 feet long, a first aid pouch with six adhesive strips and nothing else. These meet a price point but fail in the field. A flashlight needs standard batteries you can replace. Jumper cables need enough gauge and length to reach between two vehicles parked end to end. A first aid kit needs actual gauze, tape, and wound care supplies.

The NSC's recommendation to check every six months is the single most effective thing you can do for your kit. Mark it on the calendar. When daylight saving time changes, check the kit.