Runway lights are one of the critical elements at any airport. Although they often go unnoticed by passengers, these lights play a fundamental role in the safety and efficiency of air operations, especially during adverse weather conditions and at night.
From Viarium, we explain how runway lights work and their importance for pilots.
What are runway lights and what are they used for?
Runway lights are visual systems strategically installed on airport runways to visually guide pilots during the critical phases of landing and takeoff, ensuring correct alignment, position, and orientation at all times.
The visibility provided by these lights is crucial for maintaining operational safety, preventing accidents and facilitating smooth operation.
These lights are not simply a matter of convenience; they are a strict regulatory requirement that airports must comply with in order to operate in all weather conditions and during nighttime hours.
It doesn't matter if we're talking about one of the Europe's largest airports, the world's smallest airport or the largest airport in Spain. Lights are extremely important in all cases when it comes to airports.
Types of runway lights
There are different types of lights on a runway, each with specific and clearly defined functions. Let's take a look at the main ones:
1. Runway edge lights
These are the most visible and well-known to the general public. These lights visually mark the lateral boundaries of the runway. They are usually arranged in a straight line on both sides and are visible from long distances.
2. Threshold lights
These lights mark the operational start and end of the runway. They are especially important during landing, indicating to the pilot exactly where to touch down.
3. Centerline lights
They are located exactly in the center of the runway, aligned longitudinally, providing additional guidance to pilots, especially in conditions of reduced visibility.
4. Contact zone lights
These lights are specifically designed to indicate the optimal area where the aircraft's wheels should make contact with the runway during landing. They facilitate more accurate and safer landings.
5. Runway end lights
They clearly mark the end of the runway to prevent aircraft from overshooting the safe limit.
Track light colors
The colors used in runway lights are not arbitrary; each color communicates a specific message:
- White: Generally used for edge lights and centerline lights. They provide guidance and alignment for the pilot.
- Green: These indicate the beginning of the runway threshold. They are the lights that pilots actively look for during the final approach.
- Red: They mark the end of the track or restricted areas, alerting drivers to avoid continuing beyond a certain point.
- Amber (yellow): Used near the end of the runway to warn that it is coming to an end and that the pilot should prepare to stop or take off soon.
A correct understanding of these colors is vital for pilots and air traffic controllers, as any confusion could lead to serious operational incidents.
Track light spacing
The spatial arrangement of runway lights is also carefully regulated. Uniform and precise spacing ensures that visual information is consistent and easily interpretable by pilots.
- Runway edge lights are typically spaced every 60 meters as a general standard.
- Centerline lights have a standard spacing of approximately 15 to 30 meters depending on the length and operating category of the runway.
- The contact zone lights are arranged in symmetrical pairs at intervals of 150 meters from the initial threshold of the runway.
Each airport must strictly adhere to these specifications, regulated by international bodies such as the International Civil Aviation Organization (ICAO), in order to maintain high standards of operational safety.
Conclusions on runway lights
In conclusion, runway lights are essential elements for the safety and efficiency of air operations. Safety and operation depend on their correct placement, color, and functioning in all conditions.
