Roads, railways and rail transit lines play major roles in transporting passengers and freight.
In the design process for such transportation infrastructures, the alignment determination …

A horizontal alignment can be represented by three key factors: number of horizontal points
of intersection (HPIs), their locations, and corresponding horizontal curve radii. Deciding all …

Optimization of three-dimensional road alignments is a nonlinear non-convex optimization
problem. The development of models that fully optimize a three-dimensional road alignment …

In the vertical alignment phase of road design, one minimizes the cost of moving material
between different sections of the road while maintaining safety and building code …

Selecting an optimal vertical alignment while satisfying safety and design constraints is an
important task during road construction. The amount of earthwork operations depends on …

When building a road, it is critical to select a vertical alignment which ensures design and
safety constraints. Finding such a vertical alignment is not necessarily a feasible problem …

Optimizing highway alignments is a very complex engineering problem. None of existing
methods has totally solved the problem In this paper we build an optimization model for …

Emissions reduction has emerged as one of the principal targets in the planning and
designing of road alignment today, and intelligent design methods can help optimize road …

In the highway development process, the first planning stage is that of selecting a corridor
along which the highway is to pass. Highway corridor selection represents a multicriteria …

The main purpose of this work is the comparison of several objective functions for
optimization of the vertical alignment. To this end, after formulation of optimum vertical …