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The air pressure of tires must be checked at least once each month. For safe driving and fuel economy, tires should have the right amount of air. Follow the manufacturer’s recommendation. The best time to check air pressure is when the tires are cool. If you do not have an air pressure gauge, you can take your vehicle to a nearby service station or auto center to have it checked. 

## Horns and Sirens 

Only law enforcement and emergency vehicles may have emergency lights or sirens. 

•  Every licensed motor vehicle must be equipped with a horn in good working order. 

• The horn must be loud enough to be heard for at least 200 feet, and it must not make any unreasonably loud or harsh sound. 

• If the horn fails, have it repaired immediately. 

• The horn must be used as a reasonable warning device. You should not use the horn unnecessarily or unreasonably. 

## Muffler and Exhaust System 

Every motor vehicle must have a muffler that is in good working order. The muffler filters smoke and excessive noise. One function of the exhaust system is to take harmful fumes from the engine to the rear of the vehicle to be released. Check your exhaust system often to be sure it is not leaking. A leak in the exhaust system can allow poisonous carbon monoxide gas to enter the passenger compartment of the vehicle. Carbon monoxide poisoning often can be fatal, and even small amounts can cause you to become sleepy or unconscious and lose control of the vehicle. For this reason, it is suggested that you keep a window open about one inch while traveling. 

## Suspension System 

If a vehicle sways freely, leans heavily to one side during a turn or seems to bounce continuously, there may be a problem with the suspension system. Have a mechanic inspect the suspension system, including shock absorbers, and immediately correct any defects. A faulty suspension system can cause you to lose control of the vehicle. 

## Emergency Warning Flashers 

Vehicles are equipped with an emergency warning device that flashes all four turn signal lights. These flashers can be used as a warning by any vehicle to signal other drivers of a possible danger or that a vehicle is stopped or disabled. 

## Drive Green 

Driving green means adopting a few simple, inexpensive driving habits to decrease the amount of fuel you use and put more money in your pocket. 

• When you carry extra weight, your vehicle must work harder. 

• Check tire pressure once a month and keep tires properly inflated. 

• Every five miles over 60 mph can cost you up to an additional 30 cents a gallon. 

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