Optimization of Runway Orientation

This paper presents a computer model, named WNDROS, for optimizing the runway orientation based on given wind data and allowable crosswind component. The model is based on a mathematical formulation, which transfers circles and radial lines of the wind rose method into points with numeric coordinates. The development of the model is presented and discussed in detail in this paper. In determining the wind coverage for a given runway direction, the model calculates exactly the areas of sectors covered, fully or partially, by the runway template and determines a factor for adjusting the wind data of covered sectors. The optimization is achieved through an “exhaustive search” by evaluating the coverage at small increments of orientation angle covering all possible directions. The model compares the results of evaluated coverage and reports the best solution together with several competitive alternatives. Results of the model were thoroughly verified against exact measurements in AutoCAD, which confirmed the model accuracy. The model has a flexibility to function under any combination of number of wind directions, number of wind speed intervals, and allowable crosswind. The model is demonstrated through a numerical example and proves to be convenient and accurate.