What is TIS–B in Aviation? (Traffic Information Service – Broadcast)

Traffic Information Service – Broadcast (TIS–B) is an important component of the Federal Aviation Administration’s (FAA) Next Generation Air Transportation System (NextGen) in the United States. It is an ADS-B (Automatic Dependent Surveillance-Broadcast) technology that provides pilots with real-time information about other aircraft in their vicinity. TIS-B enhances situational awareness and helps pilots make informed decisions to avoid potential conflicts and ensure safe and efficient flight operations.

TIS-B receives surveillance data from ground-based radar and other aircraft equipped with ADS-B Out technology. This data is then broadcast to aircraft equipped with ADS-B In receivers. Through TIS-B, pilots are able to see the position, altitude, groundspeed, and heading of nearby aircraft, including those not visible to their cockpit display systems.

How Does Traffic Information Service – Broadcast Work?

TIS-B uses the ADS-B technology to disseminate relevant traffic information to pilots. ADS-B relies on aircraft broadcasting their own GPS-derived position, altitude, speed, and other data to ground stations and other aircraft. This information is then fused and processed to create a comprehensive traffic picture in the airspace.

The ground-based ADS-B transceivers receive information from aircraft equipped with ADS-B Out, as well as radar data from air traffic control. This data is combined and broadcast to aircraft with ADS-B In capabilities. Pilots who receive TIS-B data see an overlay of nearby aircraft on their cockpit display, allowing them to monitor the traffic situation and make better decisions to maintain separation and avoid potential conflicts.

Benefits of Traffic Information Service – Broadcast

TIS-B provides numerous benefits to pilots and the aviation community as a whole. Here are some key advantages:

Enhanced Safety

TIS-B significantly enhances safety by providing real-time traffic information to pilots. By being aware of nearby aircraft, pilots can adjust their flight paths or altitudes to avoid potential collisions. The ability to see aircraft that may not be visible through other means, such as weather conditions or obstructions, is a critical safety feature.

According to a study conducted by the FAA, aircraft equipped with ADS-B In and TIS-B experienced a 58% reduction in near mid-air collisions (NMACs). This statistic highlights the effectiveness of TIS-B in preventing conflicts and ensuring safe operations in the airspace.

Improved Efficiency

TIS-B also contributes to improved efficiency in air traffic management. By providing pilots with accurate and timely traffic information, it helps in optimizing flight routes and reducing congestion. Pilots can make informed decisions to navigate around busy areas or select alternate routes to avoid delays.

Furthermore, TIS-B allows for better coordination between pilots and air traffic controllers. With a common traffic picture, controllers can provide more precise and proactive instructions, improving the overall flow of aircraft and minimizing unnecessary delays.

Cost Savings

TIS-B offers cost savings for pilots and operators. By providing accurate traffic information, it reduces the need for excessive separation between aircraft, allowing for more efficient use of airspace. This can result in fuel savings and reduced emissions.

In addition, TIS-B eliminates the reliance on expensive ground-based radar systems for traffic surveillance. This technology shift reduces infrastructure costs for air traffic management authorities while maintaining or even improving the level of safety.


Traffic Information Service – Broadcast (TIS-B) is an essential component of the FAA’s NextGen program, offering real-time traffic information to pilots. By leveraging ADS-B technology, TIS-B enhances situational awareness and contributes to safer and more efficient flight operations. With its ability to provide comprehensive traffic data, TIS-B ensures pilots can make informed decisions to avoid conflicts and maintain separation. The benefits of TIS-B include enhanced safety, improved efficiency, and cost savings for pilots and operators.

As aviation technology continues to evolve, having reliable and accurate traffic information is crucial for safe and efficient flight operations. TIS-B plays a vital role in achieving this goal, and its widespread adoption contributes to a safer and more reliable airspace environment.

For More: What is MSSS in Aviation? (Mode S-Specific Services)