The unauthorized presence of a plane or other vehicle on an active runway, known as "runway incursion," has been a major concern for years.

The 1977 Tenerife airport disaster, the deadliest accident in aviation history, was the result of a runway incursion.

Most runway incursions happen quickly, leaving little time for corrective action.

Reducing these runway incursions is a critical safety effort.

Extending collision avoidance below 1,000 feet above ground level, and detecting runway incursions.

This was the third accident for Yemenia; the previous two were runway incursions with no fatalities, although one aircraft was written off.

This latest in a string of aviation accidents this year was a so-called runway incursion.

Two of October's incidents, both in California, show how harrowing a runway incursion can be.

In April, it announced a plan to reduce runway incursions that included studying ways to reduce human error and improve ground communications.

That is why reducing runway incursions is one of our highest priorities.