Abstract
Abstract: The development of "expert systems" for microcomputer applications has received increasing attention in the transportation engineering field. Expert systems are computer programs that include simulations of the logical reasoning and problem-solving processes of human experts for specific applications. The major advantage of expert systems is that they permit specific human knowledge used in the decision-making process to be systematically examined, organized, and applied to particular engineering problems. During the typical intersection design process, highway engineers make many decisions concerning the operational effectiveness and trade-offs among a number of design factors. This study illustrates the prototype applications of expert system design and LISP programming in the intersection design process. AutoLISP was used to create a small-scale expert system to interface with the normal drawing functions. This study demonstrates the feasibility of implementing built-in functions of the AutoCAD system through AutoLISP programs to assist end users in completing the decision making for potential intersection design applications.
Keywords: intersection design, expert system, CAD, AutoLISP programming.