Multiobjective Railway Alignment Optimization Using Ballastless Track and Reduced Cross-Section in Tunnel

The increasing need for railway planning and design to connect growing cities in inland mountainous areas has pushed engineering efforts toward the research of tracks that must comply with more restrictive constraints. In this study, a multiobjective alignment optimization (HAO), commonly used highway projects, was carried out identify better solution constructing high-speed track considering technical economic feasibilities. Then, two different innovative scenarios were investigated: an unconventional ballastless superstructure, which is environment-friendly than gravel reduced cross-section tunnel, enables slower speed then, less geometric constraints earthmoving. results showed first obtained performance slight increase cost. Moreover, both improved preliminary optimization, reducing overall cost by 11% scenario 20% second one.