Showing papers on "Network traffic simulation published in 1971"
01 Jun 1971
TL;DR: In this paper, the authors describe the development, calibration and validation of the network simulator model UTCS-1, designed to serve as a mECHANISM for evaluating ALTERNATIVE TRAFFIC network control strategies.
Abstract: THE REPORT DESCRIBES THE DEVELOPMENT, CALIBRATION AND VALIADATION OF THE NETWORK SIMULATION MODEL UTCS-1, DESIGNED TO SERVE AS A MECHANISM FOR EVALUATING ALTERNATIVE TRAFFIC NETWORK CONTROL STRATEGIES. THE UTCS-1 MODEL IS PROGRAMMED IN FORTRAN IV AND INCORPORATES THE FOLLOWING MAJOR FEATURES: (A) STOCHASTIC SIMULATION OF INDIVIDUAL VEHICLES BY TYPE, USING A SIMPLIFIED CAR-FOLLOWING MODEL WITH TIME- SCANNING PERIODS OF ONE SECOND; (B) CAPABILITY OF REPRESENTING A NETWORK OF, AT LEAST, 100 NODES; (C) A COMPLETE SET OF MEASURES OF EFFECTIVENESS OF THE TRAFFIC SYSTEM IN THE OUTPUT, (D) DETAILED TREATMENT OF PEDESTRIAN/VEHICLE INTERACTION, BUS TRAFFIC AND INTRA-LINK FRICTION SUCH AS ILLEGAL PARKING AND TAXICAB STOPPAGES; (E) SIMULATION OF ELECTRONIC SURVEILLANCE SYSTEMS; AND (F) REPLICATION OF ALL FORMS OF TRAFFIC CONTROLS INCLUDING REAL-TIME DYNAMIC SIGNAL CONTROL SYSTEMS. /AUTHOR/
30 citations
TL;DR: A DIGITAL COMPUTER SIMULATION of a FOUR-JUNCITON TRAFFIC NET WORK was conducted in order to further investigate a control policy described in a PREVIOUS PAPER (LONGLEY, 1968) as discussed by the authors.
12 citations
01 Jan 1971
TL;DR: An extensive measurement capability has been implemented in the Interface Message Processors of the ARPA network of computers to provide insight into network behavior, and to support the analytic and simulation modeling work being done at UCLA.
Abstract: An extensive measurement capability has been implemented in the Interface Message Processors (IMP's) of the ARPA network of computers These measurement facilities were implemented by the network contractor, Bolt Beranek and Newman, Inc, to meet the measurement needs of the UCLA Network Measurement Center, and consist of software routines within the store-and-forward IMP's to accumulate statistics, periodically record snap-shots, trace selected messages through the net, and to be able to generate artificial traffic These capabilities have been augmented by routines at the Network Measurement Center to provide selective control over the data gathering functions, as well as, providing data reduction and print-out routines, and more extensive artificial traffic generation facilities The purpose of the measurement effort is to provide insight into network behavior, and to support the analytic and simulation modeling work being done at UCLA In this latter role, the measurements provide a means of verifying, or correcting, models of network behavior by performing appropriate tests in the actual network environment The result of several such efforts will be discussed
8 citations
TL;DR: This study demonstrates an integration of these approaches into a single method of network analysis which requires significantly less restrictive assumptions than does PERT while producing “believable” assessments of project duration.
Abstract: Resolutions of the theoretical and behavioral problems of network-based techniques such as PERT have been attempted through simulation and historical estimating behavioral approaches. This study demonstrates an integration of these approaches into a single method of network analysis which requires significantly less restrictive assumptions than does PERT while producing “believable” assessments of project duration.
2 citations
01 Jun 1971
TL;DR: In this paper, the authors present a detailed DOCUMENTATION of each of the 43 subroutines making up the UTCS-1 TRAFFIC NETWORK SIMULATION MODEL.
Abstract: THE PAPER CONTAINS DETAILED DOCUMENTATION OF EACH OF THE 43 SUBROUTINES MAKING UP THE UTCS-1 TRAFFIC NETWORK SIMULATION MODEL DEVELOPED IN THIS STUDY. FLOW CHARTS OUTLINE THE LOGIC OF EACH SUBROUTINE AND ALL STORAGE ARRAYS ARE DESCRIBED. /AUTHOR/
1 citations