The US Federal Aviation Administration (FAA) has said that serious runway incursions across major US airports have dropped by 50% from last year.
The drop, from 12 to six, has been attributed to intensive measures launched by the FAA to improve runway safety.
These included the installation of new technology, expanded requirements for improved signage and markings, and improved pilot training on runway conflict scenarios.
The FAA also said that the runway status lights system at Boston Logan International Airport has successfully completed a test period of 90 days.
The system, which will be installed at 23 airports across the country next year, will give direct warnings to pilots of potential runway incursions or collisions through a network of red lights that are embedded in the airfield pavement.
The new technology is also being used at Dallas Fort Worth International Airport, San Diego International Airport and Los Angeles International Airport.