TRAFFIC SIGNAL CONTROL DEVICE AND TRAFFIC SIGNAL CONTROL METHOD

• Main Author: KAZAMA TAKAHIRO
• Format: Patent
• Language: English
• Published: 08.01.2009
• Subjects: PHYSICS; SIGNALLING; TRAFFIC CONTROL SYSTEMS

PROBLEM TO BE SOLVED: To set the indication time of specific indication such as indication exclusive for a right turn by properly varying it according to traffic circumstances in autonomous distribution type traffic signal control. SOLUTION: The control parameter of a signal device determines (1) an indication time T of specific indication such as indication exclusive for a right turn, (2) cycle length C, and (3) split in this order. The demand rate ρ of each incoming route having a passage right under specific indication among incoming routes at a self-intersection is calculated, and (1) the indication time T is determined according to a relationship between the predetermined demand rate ρ and the indication time T based on any of the calculated demand rates ρ. Then, (3) the split is determined so that a time (C-L) calculated by subtracting a loss time L(including indication time T of specific indication) from cycle length C can be distributed in proportion to the demand rate λ of each of the other indication excluding specific indication. COPYRIGHT: (C)2009,JPO&INPIT