Samacheer Kalvi 9th Social Science Road Safety Exercise Solutions | KalviGavani

The three categories of traffic signs are:

• Mandatory signs — Circular with red borders. They give commands that must be obeyed (e.g., Stop, No Entry, Speed Limit). Violation is punishable under the Motor Vehicles Act.
• Cautionary signs — Triangular with red borders. They warn road users about potential hazards ahead (e.g., Sharp Curve, School Zone, Railway Crossing).
• Informatory signs — Rectangular with blue backgrounds. They provide useful information like directions, distances, hospitals, and petrol pumps.

Seat belts restrain the occupant to the seat during sudden braking or a collision, preventing them from being thrown against the dashboard, windshield, or out of the vehicle. Studies show seat belts reduce the risk of fatal injury by about 45% for front-seat occupants. Under the Motor Vehicles (Amendment) Act, 2019, not wearing a seat belt attracts a fine. Seat belts are compulsory for all occupants of a motor vehicle.

1. Overspeeding — Exceeding speed limits reduces reaction time and increases crash severity. 2. Drunken driving — Alcohol impairs judgement, vision, and motor coordination. 3. Using mobile phones while driving — Distracts attention and slows reaction time. 4. Poor road conditions — Potholes, lack of signage, and poorly designed intersections contribute to accidents.

Lane discipline means driving within the marked lane and changing lanes only after using indicators and confirming it is safe. It is important because:

• It prevents vehicles from swerving into each other.
• It ensures smooth traffic flow, especially on highways.
• It reduces the risk of side-swipe collisions and overtaking accidents.
• Emergency vehicles can move faster when lanes are orderly.

• Use the zebra crossing or pedestrian subway wherever available.
• Look left, look right, and look left again before crossing.
• Wait for the green pedestrian signal at traffic lights.
• Never cross between parked vehicles or at curves where visibility is poor.
• Avoid using mobile phones or earphones while crossing.
• Walk briskly but do not run, which can cause falls.

First offence: Fine up to Rs. 10,000 and/or imprisonment up to 6 months. Repeat offence: Fine up to Rs. 15,000 and/or imprisonment up to 2 years. The driver's licence is also suspended. The BAC limit is 0.03% (30 mg per 100 ml of blood).

Traffic signals regulate the movement of vehicles and pedestrians at intersections by assigning the right of way in time. They:

• Reduce collisions by separating conflicting traffic flows.
• Control speed near intersections.
• Provide safe crossing windows for pedestrians.
• Manage congestion during peak hours.
• Emergency vehicles can be given priority through signal pre-emption.

Traffic signs in India are classified into three types:

Mandatory (Regulatory) Signs:

• Shape and colour: Circular with red borders; some have a red slash.
• Purpose: They instruct road users about laws and regulations that must be followed.
• Examples: Stop (red octagon), Give Way (inverted triangle), No Entry (red circle with white bar), Speed Limit (red circle with number), No Parking, No Horn Zone, One-Way.
• Significance: Violating mandatory signs is a punishable offence under the Motor Vehicles Act. They are essential for maintaining order and preventing chaos on roads.

Cautionary (Warning) Signs:

• Shape and colour: Equilateral triangle with red border, white background, and black symbol.
• Purpose: They warn road users about potential hazards ahead so they can take precautionary action.
• Examples: Sharp Curve, Narrow Road, School Zone, Railway Crossing Ahead, Steep Descent, Men at Work, Roundabout.
• Significance: They reduce the element of surprise and give drivers time to react, preventing accidents at hazardous locations.

Informatory Signs:

• Shape and colour: Rectangular with blue background and white symbols or text.
• Purpose: They provide useful information to make travel easier and more convenient.
• Examples: Hospital, Petrol Pump, Parking, Directions, Distance markers, Resting place, First Aid Post.
• Significance: They help road users navigate unfamiliar areas, locate essential services, and plan their route, reducing confusion and risky last-minute decisions.

Together, these three categories form a comprehensive system that guides, warns, and regulates every road user, making roads safer for all.

Safety measures for two-wheeler riders:

1. Wear a helmet: Both rider and pillion must wear an ISI-marked helmet that covers the full head. The strap must be fastened securely. A helmet reduces the risk of head injury by approximately 69% and death by 42%.

2. Obey speed limits: Two-wheelers are particularly vulnerable at high speeds because they have only two points of contact with the road. Overspeeding dramatically increases stopping distance and collision severity.

3. Use indicators and hand signals: Always signal before turning or changing lanes. This communicates intent to other road users and prevents collision.

4. Maintain safe distance: Keep at least a two-second gap from the vehicle ahead. This gives enough time to brake if the vehicle in front stops suddenly.

5. Avoid riding in blind spots: Stay visible to larger vehicles, especially trucks and buses, which have large blind spots on either side.

6. Do not use mobile phones: Even a momentary distraction can be fatal on a two-wheeler. Stop at a safe place if a call is essential.

7. Never drink and ride: Alcohol impairs balance, judgement, and reaction time — all of which are critical for two-wheeler stability.

8. Ensure the vehicle is roadworthy: Check brakes, tyres, lights, and mirrors before every ride.

9. Carry only one pillion: Overloading affects balance and braking. The pillion must also wear a helmet.

Why helmets are important:

• The skull can fracture from an impact at speeds as low as 15 km/h. Helmets absorb impact energy and distribute force across the shell.
• Head injuries are the leading cause of death in two-wheeler accidents (over 70% of fatal two-wheeler crashes involve head trauma).
• The Motor Vehicles Act mandates helmet use. Violation attracts a fine and licence suspension.
• Helmets also protect from dust, wind, rain, and noise, improving rider comfort and focus.
• ISI-marked helmets meet Bureau of Indian Standards for impact resistance — cheap, non-certified helmets offer little real protection.

First aid is the immediate care given to an injured person before professional medical help arrives. It aims to preserve life, prevent the condition from worsening, and promote recovery.

Steps to follow at a road accident scene:

1. Ensure your own safety first: Park your vehicle at a safe distance, turn on hazard lights, and place a warning triangle 50 metres before the accident site. Do not rush into traffic.

2. Call emergency services: Dial 108 (ambulance) and 100 (police). Provide the exact location, number of injured persons, and severity of injuries. Stay on the line until the operator confirms help is on the way.

3. Do not move the injured unless necessary: Moving a person with spinal injuries can cause permanent paralysis. Move them only if there is immediate danger (fire, oncoming traffic, fuel leak).

4. Check for breathing and consciousness: Gently tap the shoulder and ask, "Can you hear me?" If unconscious and not breathing, begin CPR if you are trained. If breathing, place them in the recovery position (on their side) to keep the airway clear.

5. Control bleeding: Apply direct pressure on wounds with a clean cloth. Do not remove embedded objects (glass, metal) — stabilize them with padding around the object. Elevate bleeding limbs above heart level if possible.

6. Do not give food or water: An injured person may need surgery, and food/water can cause choking or complicate anaesthesia.

7. Immobilise fractures: If you suspect a fracture, do not try to set the bone. Splint the limb in the position you found it using sticks, rolled newspaper, or any rigid material padded with cloth.

8. Keep the injured warm and calm: Cover with a blanket to prevent shock. Reassure them that help is coming. Panic worsens the condition.

9. Note vehicle numbers and details: Write down the registration number, colour, and model of vehicles involved. This assists police investigation and insurance claims.

10. Cooperate with authorities: When police and ambulance arrive, share all information truthfully. Do not leave the scene if you are a witness.

Key principle: The golden hour — the first 60 minutes after a trauma — is critical. Timely first aid and rapid transport to a hospital can save lives.

The Motor Vehicles (Amendment) Act, 2019 introduced stringent penalties and new provisions to improve road safety in India:

Enhanced Penalties:

• Drunken driving: Fine up to Rs. 10,000 and/or imprisonment up to 6 months (first offence); up to Rs. 15,000 and/or 2 years (repeat offence). Licence suspension is mandatory.
• Overspeeding: Fine of Rs. 1,000 to Rs. 4,000 depending on the extent. Repeat offence can lead to licence seizure.
• Not wearing a helmet: Fine of Rs. 1,000, licence suspension for 3 months, and/or community service.
• Not wearing a seat belt: Fine of Rs. 1,000.
• Using mobile phone while driving: Fine of Rs. 5,000 for the first offence.
• Red light jumping: Fine of Rs. 1,000 (first offence).

New Provisions:

• Cashless treatment: The Act mandates cashless medical treatment for accident victims during the golden hour, with costs borne by a solatium fund.
• Good Samaritan protection: People who help accident victims are protected from civil and criminal liability. They cannot be compelled to disclose their identity or serve as witnesses.
• Vehicle recall: If a defect is found that affects safety, the government can order mandatory recall and the manufacturer must refund or replace the vehicle.
• Road safety fund: A dedicated fund for road safety initiatives, awareness campaigns, and infrastructure improvements.
• Guardian liability: If a juvenile commits a traffic offence, the guardian/owner is held responsible with fines up to Rs. 25,000 and imprisonment up to 3 years. The juvenile cannot obtain a licence until age 25.

Significance: The amended Act aims to create a strong deterrent against traffic violations, ensure timely medical care for victims, and encourage citizens to help accident victims without fear of legal harassment.