TY  - JOUR
PY  - 1987//
TI  - Application of expert systems to left-turn signal treatment
JO  - Transportation research record
A1  - Chang, Edmond Chin-Ping
SP  - 28
EP  - 36
VL  - 1145
IS  - 
N2  - Left-turn treatments are essential to signal capacity and operational safety at signalized intersections. Left-turn warrants and guidelines are sets of evaluation procedures designed to maximize level of service, minimize approach delay, and reduce left-turn-related accidents. Currently, three left-turn phasings are used to allow vehicles to make left turns on a green arrow or a circular green indication: permissive, exclusive, and exclusive/permissive. An experimental expert system design for recommending alternative left-turn phase selection on microcomputer systems was investigated. The goal of this study was to computerize left-turn phase selection by using artificial intelligence languages and knowledge engineering. This study focuses on investigating expert systems programming using PROLOG and the INSIGHT 1 system in an IBM PC/XT/AT microcomputer environment. Three experimental systems were developed using the PD PROLOG system, the TURBO PROLOG system, and the INSIGHT 1 knowledge engineering system. The background of the study, the artificial intelligence concept, the basic systems design, and the practical experience gained are discussed. Potential advantages and disadvantages of developing expert systems using different artificial intelligence languages and the knowledge engineering for traffic engineering applications are evaluated. The results of this limited study indicate that it is feasible to combine artificial intelligence and traffic engineering technologies for alternative traffic signal analysis.       Record URL:         http://onlinepubs.trb.org/Onlinepubs/trr/1987/1145/1145-004.pdf    TRT Terms: Artificial intelligence; Computer programming; Exclusive permissive phasing; Exclusive phasing; Expert systems; Feasibility analysis; Left turn phase; Microcomputers; Permissive phasing; System design; Traffic engineering Uncontrolled Terms: Programming Old TRIS Terms: Left turn phasing<p /> <p>Language: en</p>
LA  - en
SN  - 0361-1981
UR  - http://dx.doi.org/
ID  - ref1
ER  -