Showing papers on "Network traffic simulation published in 1972"

Queuing simulation using a random number generator

Abstract: Among the system performance predictive techniques available to the systems engineer are those of theoretical analysis and simulation. One method of simulation uses the random number generator to simulate the probability distribution of events. Introduced are principles of random number generator simulation together with examples, the results of which are compared with theoretical results.

Synchronization of traffic signals in a network for loss minimizing offsets

Abstract: THIS PAPER DEVELOPS SOME FUNDAMEDNTAL PROCEDURES FOR OBTAINING TRAFFIC SIGNAL OFFSETS WHICH MINIMIZE THE TOTAL LOSS TO TRAFFIC IN A NETWORK. THESE PROCEDURES HAVE SOME COMMON ASSUMPTIONS: (1) ALL TRAFFIC SIGNALS IN A NETWORK HAVE A COMMON PERIOD, (2) THE RED-GREEN SPLIT IS GIVEN AT EACH SIGNAL, AND (3) THE LOSS TO TRAFFIC GENERATED IN A LINK WHICH HAS INTERSECTIONS AT BOTH ENDS OF IT DEPENDS ONLY ON THE TRAFFIC FLOW ON IT AND THE OFFSETS AT THOSE INTERSECTIONS, AND, ACCORDINGLY, IS INDEPENDENT OF OFFSETS AT ANY OTHER INTERSECTIONS. THE MATHEMATICAL PROCEDURES USED IN THE PAPER ARE DYNAMIC PROGRAMMING AND THE DISCRETE MAXIMUM PRINCIPLE. IN BOTH CASES, A NETWORK IS DIVIDED INTO SOME SECTIONS THAT CORRESPOND TO STAGES IN A MULTISTAGE DECISION PROCESS AND THE OBJECTIVE FUNCTION OR THE TOTAL LOSS IN THE NETWORK IS MINIMIZED IN PASSING THROUGH THOSE SECTIONS. AS A NUMERICAL EXAMPLE, THE OPTIMAL OFFSET PATTERN IS DETERMINED FOR A SMALL NETWORK THROUGH THESE TWO PROCEDURES. IN ADDITION, THE MINIMUM LOSS OBTAINED BY THIS OPTIMIZATION IS COMPARED WITH THE TOTAL LOSS GENERATED IN THE NETWROK WHEN ONLY TRAFFIC SIGNALS ON MAIN STREETS ARE OPTIMALLY CONTROLLED, THE NETWORK IS SYNCHRONIZED UNDER A ONEWAY SYSTEM, OR THE SIGNAL AT EACH INTERSECTION IS CONTROLLED INDIVIDUALLY.