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Q: What precautions should we take while driving in foggy conditions like we have in this region of the world now?

Several accidents are taking place. How should we avoid them?

Krishna: As winter intensifies, fogs descend on most   parts of  India. Fogs cause the cold to penetrate through the layers of warm clothing, adding to your distress. The biggest hazard is to physical safety as low visibility potentially causes more accidents than vehicular failure. So, you need to be a little more alert when you venture outside your home. Walking, jogging, exercising, riding, or driving — you need to be more careful than at other times to prevent accidents or collisions.

The best thing to do is not to drive until visibility is good.

If you must drive in foggy conditions, keep the following safety tips in mind:

    • Slow down and allow extra time to reach your destination.
    • Make your vehicle visible to others both ahead of you and behind you by using your low-beam headlights since this means your tail lights will also be on. Use fog lights if you have them.
    • Never use your high-beam lights. Using high beam lights causes glare, making it more difficult for you to see what’s ahead of you on the road.
    • Leave plenty of distance between you and the vehicle in front of you to account for sudden stops or changes in the traffic pattern.
    • To ensure you are staying in the proper lane, follow the lines on the road with your eyes.
    • In extremely dense fog where visibility is near zero, the best course of action is to first turn on your hazard lights, then simply pull into a safe location such as a parking lot of a local business and stop.
    • If there is no parking lot or driveway to pull into, pull your vehicle off to the side of the road as far as possible. Once you come to a stop, turn off all lights except your hazard flashing lights, set the emergency brake, and take your foot off of the brake pedal to be sure the tail lights are not illuminated so that other drivers don't mistakenly run into you.
    • Watch your speed: You may be going faster than you think. If so, reduce speed gradually and avoid passing, changing lanes and crossing traffic.
    •  See and be seen: Use your low-beam headlights. High-beams reflect off the moisture droplets in the fog, making it harder to see. Always have your tail-lights and blinkers on so that other drivers can spot your car and maintain safe distance.
    • Use fog lights: Most mid and low segment cars in India don’t have fog lights.
    • In case your car doesn’t have fog lights, keep yellow cellophane paper handy. Stick it to your car’s headlights and turn the high beam on.
    • Reduce the distractions in your vehicle. For example, turn  off your cell phone and radio.  Roll down your window to help you hear other traffic on the road.
    • Drive closer to the kerb and follow the magnetic blinkers on the side of teh road.
    • Keep a sensible amount of space between your car and the car in front.Less distance gives you lesser time to react when things go  wrong.
    • Turn on your heater: Fog outside .. will often cause condensation inside.
      Check that your windscreen and windows are clean, and that  your light indicators are working.
    • Over time, the headlights tend to turn yellow. Clean them. 
    • Blow the horn repeatedly, especially while changing lanes an at turns.
    • Needless to say, don’t drink and drive.
    • Pull over to the side of the road if you have no visibility. Turn on your emergency flashers, in addition to keeping your low-beam headlights on.
    • Drive safe.
Q: Is fog harmful to human beings? 
Krishna: Fog adversely impacts breathing for two reasons. Firstly, breathing in a fog means your delicate lungs are exposed to cold, watery air. This can cause chills, and irritation causing coughs and sniffles.
Typically, drinking tea or coffee clears the cobwebs from the brain. Since too much tea or coffee can be harmful, try deep breathing exercises when you are indoors to ensure that you can send more oxygen to your brain, and sharpen your senses.
In people with low immunity and vitality levels, it could lead to bronchitis if the coughs are ignored.
When the air you breathe in is vapor laden, it means you are getting less oxygen in every breath you take. Not only are you enfeebled, but you might be somewhat disoriented due to the lower oxygen levels in your bloodstream. Also, you might find that you need more sleep, and are getting tired easily. If possible, sleep slightly longer hours to help your body cope with the additional stress.
Secondly, pollution causes fog to be Sulphur laden. Sulfur dioxide has higher concentrations in foggy air and causes constriction in the lungs. Net result is that every gulp of air messes up your system. Asthmatic people find difficulty in breathing increase proportionately with density of fog. When dissolved in the foggy air, nitrogen dioxide has displayed reactivity. Many people complain of smarting eyes, and a sense of choking. Some also experience difficulty in swallowing. So, if the area you live in has poor air quality, try and stay indoors as much as possible while the fog lasts.
Wear a light filter mask when you need to step out of the house to keep the pollutants out. Rinse your eyes with cool, clean water several times a day. Ensure you eat adequate food that is both warm and nutritious to improve your immunity and resilience levels.
Patients who suffer from rheumatism and arthritis dread the fog as it causes their joints to pain more. Colder temperatures combined with the dampness that fogs involve result in an exacerbation of rheumatoid and arthritic pain. Some doctors feel that a tendency to hibernate in winter, and lower activity levels could make the joints stiffer, making any movement extremely painful. However, the truth lies more in the fact that air pressure decreases on cold, damp or foggy days. The low air pressure causes the already inflamed tissues to expand, thereby aggravating the pain.
A little fact is that the early morning humidity caused by winter fogs put patients with any kind of cardiovascular disease at risk. Elderly people, in particular whose circulation has become sluggish due to age, are at great risk of developing cardiac distress on foggy mornings. Lower temperatures can cause blood vessels to narrow. This means that your heart must work harder to move blood throughout the body. Since fog steals your body warmth, it causes your heart rate and blood pressure to increase as the heart works harder to do its work.
People whose emotional well-being and moods are impacted by whether or not the sun is shining might experience dysthymia, i.e. low level, persistent depression during winter. It could worsen on foggy days.
If these health conditions worsen, please consult a good, qualified doctor.

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