Temperature Gauge in the Red on I-20
On I-20 east of Augusta in 96°F heat, your temperature gauge climbs past its normal mark and into the red while the air conditioner is running. You notice a faint sweet smell and a wisp of steam at the edge of the hood. The coolant light has not come on. The next exit is four miles ahead, the right shoulder is narrow and bounded by a guardrail, and traffic is passing at 70 mph. Your phone shows two bars of service. Two children are asleep in the back seat.
1. What do you do in the next minute, and how do you decide between limping to the exit and stopping now?
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First, shed load: turn off the air conditioner and turn the heater on full - it sounds wrong, but the heater core is a second radiator and it pulls heat out of the engine. Reduce speed and put on your hazard flashers.
Then decide with a rule rather than a hope. Steam plus a sweet smell points to a coolant leak, and a cooling system that is losing coolant can go from "hot" to "seized or on fire" quickly. Four miles at highway speed is several minutes of that risk. If the needle is still climbing or the steam is increasing, stop at the first safe wide spot rather than gamble on reaching the exit. If the needle stabilizes and the steam stops, a slow, hazard-lit crawl to the exit may be the better trade - a narrow guardrail shoulder is also a dangerous place to be.
2. You stop. Where do you put the car, how do you set it up, and what do you do with the hood and the radiator cap?
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Get as far right as the shoulder allows, wheels straight so the car will not roll into traffic if it is struck, parking brake set, hazard lights on.
People: everyone out through the passenger side, away from the traffic lane, and behind the guardrail or up the embankment. No one stands between the car and the road, and no one sits in the car waiting.
Hood and cap: raise the hood only when it is safe to stand at the front, and never remove the radiator cap on a hot engine - coolant well above 212°F flashes to steam and causes severe burns. Let it cool, or let a professional open it. Call for help with the two bars of service you have.
3. Georgia's Move Over law applies to you here. How much can you rely on it?
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The law requires drivers approaching a stopped emergency, tow, utility, or highway vehicle with its lights flashing to move over a lane if they safely can, and otherwise to slow below the posted limit and be ready to stop. Your hazard-lit car on the shoulder falls within the spirit and generally the letter of that protection.
But you cannot budget your safety around compliance. Some drivers will not move over, and at 70 mph a car passing inches from a person is a fatal event regardless of who was at fault afterward. The law is a layer of protection, not a shield - the guardrail, the embankment, and the passenger-side exit are what actually keep you and the children alive.