Abstract
A new highway design approach is proposed, which optimazes horizontal and vertical alignments simultaneously based on Genetic Algorithms (GAs). A new alignment model suitable for optimization problem is devised to solve a large-scale problem. Qualitative evaluation of construction cost is calculated from detailed digital terrain data. The alignments should satisfy tens of constraints and preferable conditions defined as Japanese highway standards for running salty. We developed the GAs based optimization system called ‘OHPASS’ Optimal Highway Path Automatic Search System.
