That's the entire design brief. The faces use retroreflective sheeting — the same material class as highway signs — which throws a car's headlight beam straight back toward the driver. The text lights up in their own headlights from around 500 feet out, well past normal stopping distance at highway speeds. You don't need the car to have its lights aimed at you — retroreflection works with any angle of incoming light.

15.75 × 10 inches (40 × 25.5 cm). Large enough to read at speed, small enough to fold flat and store in a glovebox or seat-back pocket. It ships in a flat-fold carry pouch.

Engineering-grade retroreflective sheeting over a rigid substrate, with fluorescent orange (HELP!) and fluorescent yellow (ALL GOOD) backgrounds and black signage-grade lettering. The same material specification used in road signs and emergency placards.

Retroreflective sheeting is designed for outdoor use and UV exposure — it's what road signs are made of. It won't fade meaningfully sitting in a glovebox. Store it out of direct sunlight when not in use and it'll last the life of your car.

Two suction cups attach to brass grommets at the top corners of the sign. The cups grip glass or any smooth painted body panel — rear window, door, trunk lid, quarter panel, hatch. Press, twist to lock, done. The weighted bottom edge keeps the sign hanging flat and still without needing a bottom mount point.

No. The integrated ballast weight along the bottom edge keeps the sign flat and stable. Combined with the suction cup mount, it stays put. It's engineered to stay mounted on a car that has been driven at highway speed to the shoulder — not just tested in still air.

Glass and smooth painted body panels — door, trunk lid, quarter panel, hatch. The cups are exterior-rated for all weather. They won't hold on textured plastic trim, matte wrap, fabric, or rubber. If you can wipe the surface clean with a damp cloth and it's smooth to the touch, it will work.

The sign is designed for exterior mounting — that's where it performs best and where the retroreflection is unobstructed. Interior mounting through glass works in a pinch but the glass reduces reflectivity and the sign may be harder to read at distance.

Under 10 seconds once you've done it once. Flip to the right face, step out, press and twist the two cups onto any clean surface, get back in. You don't need to place it perfectly — as long as the face is pointing toward traffic, it's working.

Because a stopped car with no message invites well-meaning strangers to pull onto a live shoulder to check on you — one of the most dangerous moves on the road. ALL GOOD waves them past safely, which protects them as much as it reassures them. Use it any time you're stopped but not in need of help: taking a call, resting, waiting for someone, pulled over by police.

HELP! is the signal for emergency services and highway patrol, not just passing strangers. If you've already called roadside assistance and just need responders to find you, HELP! is exactly right — it flags patrol cars and tow trucks while you stay locked inside.

Yes, always. Hazard lights are a legal requirement in most states when stopped on a roadway. RoadAlert works alongside them — hazards draw attention to the fact that you're stopped, the sign tells people what to do about it.

Yes. Retroreflective emergency signage displayed on a vehicle is legal in all 50 U.S. states. The sign meets the same retroreflective material standards used in roadside safety equipment. HELP! is unambiguous as an emergency signal and ALL GOOD is a clear non-emergency indicator. Neither message creates a legal issue.

No more than waving your arms would. The sign communicates what you'd otherwise have to communicate by standing outside. If you display HELP! and a trooper stops, that's exactly what the sign is for — tell them what you need. If you no longer need help, flip it to ALL GOOD.

The first production run is in final stages. Join the launch list and you'll get exactly one email the day it's available — with a direct purchase link and founding pricing locked in.

The RoadAlert sign (retroreflective, both faces), suction cup mount set (exterior-rated, brass grommets), weighted bottom bar pre-installed, flat-fold carry pouch, and a quick-setup card.

30-day no-questions return. If it doesn't work on your vehicle or you're not satisfied for any reason, contact us and we'll sort it out.