1.   It has also been trying to improve airport signs and runway markings to help pilots find their way.

2.   Unlike painted runway markings, the lasers have the advantage of being visible during bad weather.

3.   But Yager said runway markings showed no evidence of hydroplaning and that the runway was of the highest quality, with good traction and drainage.

4.   In addition, agency officials are visiting airports to review runway markings, signs and lights, and meet with local pilots and controllers to talk about reducing incursions.