Final answer:
Commercial airliners are regulated by the FAA to maintain safe distances and speeds. Within 10 nm of a controlled airport and below 3000ft, there is an airspeed restriction to prevent collisions and ensure safety.
Step-by-step explanation:
Commercial airliners are able to fly without running into each other due to the careful regulation of flight paths by the Federal Aviation Administration (FAA). The FAA enforces a set of rules and restrictions on airspeed and distance between airplanes to ensure safety. For example, within 10 nautical miles (nm) of a controlled airport and below 3000 feet, there is an airspeed restriction in place.
This restriction means that airplanes flying in this area must maintain a specific maximum airspeed to minimize the risk of collisions. By limiting the speed of aircraft, it allows controllers more time to manage the airspace and ensure safe separation between airplanes.
These restrictions help prevent close encounters and allow pilots and air traffic controllers to effectively manage the airspace, reducing the risk of accidents and maintaining a high level of safety.