SIGSET: A COMPUTER PROGRAM FOR CALCULATING TRAFFIC SIGNAL SETTINGS
SIGSET: A COMPUTER PROGRAM FOR CALCULATING TRAFFIC SIGNAL SETTINGS
复制标题
DOI：
--
复制
发表时间：
1971-06
期刊：
影响因子：
--
通讯作者：
R. Allsop
中科院分区：
文献类型：
--
作者：
R. Allsop
SIGSET 是一个 FORTRAN 程序，用于计算单个路口的交通信号设置。计算绿灯时间以及（如果需要）循环时间，以便在遵守指定限制的情况下，最大限度地减少信号灯定时工作时通过路口的所有交通的每单位时间的预计延误。对于车辆驱动信号，当信号周期每个部分的绿灯时间达到最大值时，就会发生这种情况。该计划通过考虑所有流量流而不是仅考虑选定的流量，对早期方法进行了改进；准确地（而不是近似地）最小化预计延迟；能够同样出色地处理简单和复杂的连接布局和信号周期。因此，与 SIGSET 生成的设置相对应的估计延迟通常明显小于与早期方法给出的设置相对应的延迟，尤其是在复杂的情况下。即使估计延迟几乎没有改善，SIGSET 也通常表明周期时间较短。 /RRL/
SIGSET IS A FORTRAN PROGRAM WHICH CALCULATES TRAFFIC SIGNAL SETTINGS AT SINGLE ROAD JUNCTIONS. THE GREEN TIMES AND, IF REQUIRED, THE CYCLE TIME ARE CALCULATED SO AS TO MINIMIZE, SUBJECT TO SPECIFIED CONSTRAINTS, THE ESTIMATED DELAY PER UNIT TIME TO ALL TRAFFIC PASSING THROUGH THE JUNCTION WHEN THE SIGNALS ARE WORKING FIXED-TIME. IN THE CASE OF VEHICLE-ACTUATED SIGNALS, THIS OCCURS WHEN THE GREEN TIME RUNS TO MAXIMUM FOR EACH PART OF THE SIGNAL CYCLE. THE PROGRAM IMPROVES ON EARLIER METHODS BY TAKING ALL TRAFFIC STREAMS INTO ACCOUNT, INSTEAD OF ONLY SELECTED ONES; BY MINIMIZING THE ESTIMATED DELAY EXACTLY, INSTEAD OF ONLY APPROXIMATELY; AND BY BEING ABLE TO DEAL EQUALLY WELL WITH BOTH SIMPLE AND COMPLICATED JUNCTION LAYOUTS AND SIGNAL CYCLES. AS A RESULT, THE ESTIMATED DELAY CORRESPONDING TO SETTINGS PRODUCED BY SIGSET IS QUITE OFTEN APPRECIABLY LESS THAN THAT CORRESPONDING TO SETTINGS GIVEN BY EARLIER METHODS, ESPECIALLY IN COMPLICATED CASES. EVEN WHEN THERE IS LITTLE IMPROVEMENT IN ESTIMATED DELAY, SIGSET OFTEN INDICATES A SHORTER CYCLE TIME. /RRL/