There are many geometric elements involved in roadway geometry design. The key elements of roadway alignment are the most important components of geometric design. Detailed discussions are available in the A policy on geometric design of highways and streets 2004 published by AASHTO [1 ]. Students traditionally use pencil and ruler to conduct roadway geometry designs over contour maps. Manual calculations of stopping sight distance, minimum turning radius, and curve alignments are required for each geometric design to ensure safety, minimize economic and environmental impacts, and minimize construction costs (minimum land cut and fill). The calculation and design process of roadway geometry design are often cumbersome and time consuming. This online roadway geometry design tool was developed to assist students conducting the geometric design of roadways on computer screen using a contour map in the background as reference. This software tool will allow students to design the geometry of a roadway more efficiently and effectively. Furthermore, students have the option to visualize the final roadway design in a 3D virtual reality environment.


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