Renee Matheson 
The third brake light, often known as the center high-mounted stop lamp (CHMSL), is a crucial component of modern vehicles, including trucks. It is typically positioned higher than the primary brake lights and is designed to catch the attention of drivers behind the truck, enhancing safety by providing an additional visual cue that the vehicle is slowing down or stopping.
Origin and Evolution of the Third Brake Light
The concept of the third brake light was introduced in the 1970s as a part of a safety study aimed at reducing rear-end collisions. It was initially tested on taxi cabs in San Francisco, and the results were promising. The National Highway Traffic Safety Administration (NHTSA) found that vehicles equipped with a third brake light had a significant reduction in rear-end collisions.
By 1986, the NHTSA mandated the installation of the third brake light on all new passenger cars sold in the United States. Trucks and other light vehicles followed suit in 1994. The adoption of this additional brake light spread worldwide, with many countries implementing similar regulations.
Importance of the Third Brake Light For Truck
The primary purpose of the third brake light for truck is to improve vehicle safety. Here’s why it is important:
- Enhanced Visibility: Positioned higher than standard brake lights, the third brake light is more visible to drivers in trailing vehicles, especially those in taller vehicles such as trucks and SUVs.
- Preventing Accidents: Studies have shown that the third brake light can reduce the likelihood of rear-end collisions by about 50%. This reduction is significant in preventing accidents, injuries, and fatalities.
- Clear Signaling: The third brake light provides a clear and distinct signal when the vehicle is braking, reducing the reaction time for the following drivers.
Common Names for the Third Brake Light
The third brake light goes by several names, reflecting its function and position. Here are some of the most common terms:
- Center High-Mounted Stop Lamp (CHMSL): The technical term used by automotive professionals and regulatory agencies.
- High-Level Brake Light: A descriptive term highlighting its elevated position.
- Safety Brake Light: Emphasizing its role in enhancing vehicle safety.
- Cargo Light: In some trucks, the third brake light doubles as a cargo light, illuminating the bed of the truck when needed.
Types of Third Brake Lights
Third, brake lights come in various designs and technologies, catering to different preferences and vehicle requirements. Some of the common types include:
LED Brake Lights
LED (Light Emitting Diode) brake lights are popular due to their brightness, longevity, and energy efficiency. They illuminate faster than traditional incandescent bulbs, providing quicker signaling to drivers behind.
Incandescent Brake Lights
Although less common in newer vehicles, incandescent brake lights are still used in some older models.
They are generally less expensive but have shorter lifespans and slower illumination times compared to LEDs.
Integrated Brake Lights
In some trucks, the third brake light is integrated with other functionalities, such as a cargo light or a rear camera system. This integration helps maximize the utility of the light assembly without compromising safety.
Custom Brake Lights
For truck enthusiasts looking to personalize their vehicles, custom third brake lights offer a way to add a unique touch. Options may include different colors, patterns, and even animations as long as they comply with legal standards.
Legal and Safety Considerations
When it comes to vehicle modifications, it is essential to understand the legal and safety implications of altering the third brake light. Here are some key points to consider:
Legal Requirements
In many regions, the third brake light is a mandatory feature. Removing or disabling it can result in fines and may cause the vehicle to fail safety inspections. Additionally, altering the light’s color or functionality in ways that violate local regulations can lead to legal issues.
Safety Standards
Maintaining the third brake light in proper working condition is crucial for safety. Regular checks and maintenance can prevent accidents caused by malfunctioning lights. It is also important to use approved replacement parts and avoid modifications that could reduce the light’s effectiveness.
Installation Guidelines
For those looking to install a custom third brake light or replace an existing one, following the manufacturer’s installation guidelines is essential. Incorrect installation can lead to electrical issues or decreased visibility, compromising safety.
Conclusion
The third brake light, or center high-mounted stop lamp (CHMSL), plays a vital role in vehicle safety. Its origin in safety research and subsequent adoption by regulatory bodies underscore its importance in reducing rear-end collisions. By enhancing visibility and providing clear signaling, the third brake light helps keep roads safer for everyone.
Whether referred to as a high-level brake light, safety brake light, or cargo light, this component is a crucial aspect of modern vehicle design. With various types available, from energy-efficient LEDs to custom designs, truck owners have options to suit their needs and preferences.
When considering modifications or replacements, it is essential to adhere to legal and safety guidelines to ensure the third brake light remains an effective safety feature. Regular maintenance and proper installation further contribute to its role in preventing accidents and enhancing road safety.
FAQs
What Is The Third Brake Light Called On A Truck?
The third brake light on a truck is commonly referred to as the center high-mounted stop lamp (CHMSL), high-level brake light, safety brake light, or cargo light.
Why Is The Third Brake Light Important?
The third brake light is important because it enhances visibility for drivers behind the vehicle, reduces the likelihood of rear-end collisions, and provides a clear braking signal.
Are Led Brake Lights Better Than Incandescent Brake Lights?
LED brake lights are generally better than incandescent brake lights due to their brightness, longevity, faster illumination times, and energy efficiency.
Can I Customize My Third Brake Light?
Yes, you can customize your third brake light, but it is important to ensure that any modifications comply with local legal standards and do not compromise safety.
What Should I Consider When Installing A Third Brake Light?
When installing a third brake light, consider following the manufacturer’s installation guidelines, using approved replacement parts, and regularly checking the light for proper functioning to maintain safety and compliance.
