CHICAGO (AP) -- Officials from Chicago's O'Hare International Airport say the airport is making improvements for the spring and summer travel season.
The changes include more technology to help pilots navigate thunderstorms and a computer program that gives airlines an earlier heads up about flight delays.
Federal Aviation Administration spokesman Bob Everson says the high winds and rain of thunderstorms are more difficult for air traffic controllers than snowstorms.
The new technology gives pilots "escape routes" to ease bottlenecks. That means planes can use alternate routes after take-off during bad weather. When the weather clears, planes can go back to a normal course.
F-A-A spokesman Bob Flynn says the focus is preventing backups of planes waiting to depart.
Last year O'Hare had the most delayed flights among U-S airports.