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EWD 101: Understanding the Basics of Early Warning Devices and Why They Matter

OneLot
OneLot
Published on October 7, 2025· 4 min read
EWD 101: Understanding the Basics of Early Warning Devices and Why They Matter

Every year, countless road accidents in the Philippines involve stalled or broken-down vehicles—many of which could have been prevented with proper safety precautions. One of the simplest yet most essential tools for roadside safety is the Early Warning Device (EWD).

These small, triangular reflectors are often seen behind stalled vehicles, but unfortunately, many drivers underestimate their importance. Some don’t carry them at all, while others don’t know how to use them properly. The results? Costly fines and unnecessary accidents.

This guide will walk you through everything you need to know about EWDs: what they are, why they're required, how to use them correctly, and how they can save lives on the road.

What is an Early Warning Device (EWD)?

An Early Warning Device is a reflective triangular sign designed to alert oncoming vehicles of a stopped or broken-down car ahead. It is especially crucial in low-visibility conditions—such as fog, rain, or nighttime driving.

Each set includes two triangles, typically red or orange, made from bright and reflective material. They are foldable, lightweight, and easy to store in your vehicle's trunk.

Legal Basis in the Philippines

The use of EWDs isn’t optional—it’s mandated by law in the Philippines.

Relevant Laws and Regulations:

  • Republic Act No. 4136 (Land Transportation and Traffic Code):

    Requires vehicles that stop on highways or public roads to display visible warning devices to alert other motorists.

  • LTO Memorandum Circular No. VPT-2018-2158:

    All vehicles must have two EWDs as part of the mandatory requirements for registration and renewal.

  • MMDA Traffic Rules:

    Failure to use or display EWDs during emergencies is a traffic violation subject to fines and penalties.

👉 In short: if your car stalls and you fail to set up EWDs, you're breaking the law and, worse, risking an accident.

Fines and Penalties for Non-Compliance

The MMDA Unified Ordinance Violation Receipt (UOVR) outlines the penalties for EWD violations:

ViolationFineAdditional Penalty
Failure to carry EWD₱5,000Possible registration issue
Failure to use/display EWD during emergency₱5,000Ticketing or towing if obstructing traffic

👉 Note: Fines may vary per local government unit (LGU). Always check the rules of your city (e.g., Makati, Quezon City, Manila).

Why Early Warning Devices are So Important

1. Reduces Risk of Accidents

Many road crashes happen because other drivers don’t notice stalled vehicles soon enough. EWDs provide early visual warning, allowing motorists to slow down or steer clear in time.

2. Keeps You and Your Passenger Safe

EWDs create a safety buffer zone so you can inspect your car or wait for help without putting yourself or your passengers in immediate danger.

3. Saves You from Fines

Using an EWD means that you are compliant with traffic laws. This means no tickets, no towing, and no hassle!

4. Promotes Road Discipline

Responsible drivers think beyond themselves. Putting out EWDs shows courtesy and awareness, making the roads safer for everyone.

How to Use Early Warning Devices Properly

When your car suddenly stops or breaks down:

  1. Turn on hazard lights immediately.
  2. Place the first EWD 4 meters behind your car to warn vehicles coming from behind.
  3. Place the second EWD 4 meters in front of your car if you're on a two-way road.
  4. Ensure both are clearly visible and not blocked by curves, obstacles, or parked cars.

👉 Pro Tip: On highways or blind corners, extend the distance up to 10 meters for better visibility.

Choosing the Right EWD

When buying EWDs, look out for:

  • LTO-approved or DOST-certified units
  • Bright reflective panels visible up to 400 meters
  • Stable base to prevent being blown by wind
  • Two pieces per set
  • Compact and foldable for easy storage

💰 Price Range: ₱300–₱800 depending on brand and quality.

🛒 Where to Buy: Auto supply stores, car accessory shops, or online marketplaces like Lazada and Shopee.

Common Mistakes to Avoid

  • ❌ Placing EWDs too close to the car
  • ❌ Using only one triangle instead of two
  • ❌ Forgetting to set them up in emergencies
  • ❌ Buying cheap, non-reflective versions

👉 Remember: visibility saves lives.


An Early Warning Device may be small, but it plays a huge role in keeping roads safe. More than just avoiding fines, it is about being a responsible and safety-conscious driver.

So before your next trip, check your trunk. Do you have two working EWDs? If not, get them today. A few hundred pesos can make the difference between safety and danger.

early warning device Philippines EWD law LTO registration requirements road safety tips PH MMDA fines

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