Showing papers on "Traffic wave published in 1972"

Low density traffic streams

Abstract: LOW DENSITY TRAFFIC REFERS TO THE STUDY OF MACROSCOPIC PROPERTIES OF A TRAFFIC STREAM WHEN VEHICLES TRAVEL INDEPENDENTLY OF ONE ANOTHER. IT IS USUALLY ASSUMED THAT EACH VEHICLE TRAVELS AT A CONSTANT VELOCITY, THE VELOCITY VARYING FROM VEHICLE TO VEHICLE. VERY GENERAL VEHICULAR MOTIONS ARE PERMITTED TO STUDY VARIOUS ASPECTS OF THE TRAFFIC STREAMS. FOR EXAMPLE, IT IS SHOWN THAT IF PI(A,B) IS THE EXPECTED TIME FOR A VEHICLE TO TRAVEL FROM A TO B UNDER THE STOCHASTIC PROCESS GOVERNING THE MOTION OF VEHICLES, THEN A NON-HOMOGENEOUS POISSON SPATIAL PROCESS WITH MEAN MEASURE PI IS INVARIANT. /AUTHOR/

Nonhomogeneous Poisson fields of random lines with applications to traffic flow

Abstract: : This study was prompted by investigations of models of traffic flow on a highway through analyses of the structure and properties of Poisson fields of random lines in a plane. It is possible to view the trajectory of a car produced by its time and space coordinates on the highway as a straight line in that plane if the car travels at a constant speed once it enters the highway and then never leaves the highway. These traffic considerations plus the property of time invariance for traffic flow distributions lead to one model for traffic flow on a divided highway developed by Renyi [10]. This idealized model is simpler to study than the more realistic situation that provided Renyi's motivation and which he also subjects to analysis, namely, cars do lose time because of an overtaking of one car by another even on a divided highway with two lanes for traffic moving in one direction.

Establishing global traffic flows

Abstract: Analyzes global vessel traffic (1969) with predictions to 1980 for all types of commercial vessels. The at-sea vessel population and resultant traffic flows are apparently increasing at a rate beyond present capability to forecast. Coupled with increasing size and speed, the safety problem is also increasing. Suggestions are made for forecasting and monitoring traffic flows in order to provide appropriate traffic information for future safe navigation in congested areas.

Comparison of traffic circulation alternatives through sigop

Abstract: RESULTS OF ANALYZING 2 TRAFFIC PATTERNS - AN EXISTING ROADWAY AND TRAFFIC SIGNAL OPERATION AND A PROPOSED TRAFFIC FLOW PATTERN WITH OPTIMIZED SIGNAL OPERATION - ARE PRESENTED. NETWORK ALTERNATIVE COMPARISONS ARE SHOWN FOR VEHICLE STOP AND DELAY COSTS, AVERAGE SPEEDS, AND TRAVEL CONDITIONS. SUGGESTED MODIFICATIONS TO THE ORIGINAL SIGOP PROGRAM ARE ALSO PRESENTED. THE PURPOSE OF THE PAPER IS TO EVALUATE THE PRACTICABILITY OF USING SIGOP RESULTS AS A MEANS OF ANALYZING TRAFIC CIRCULATION PATTERNS AND TRAFFIC SIGNAL TIMING ALTERNATIVES. CONCLUSIONS ARE THAT, WITH MINOR PROGRAM MODIFICATONS REQUIRED FOR EACH NETWORK HAVING SPECIAL TRAFFIC CHARACTERISTICS, SIGOP PROVIDES THE PRACTICAL RESULTS NECESSARY TO IMPROVE TRAFFIC CONDITIONS ON A GRID STREET SYSTEM.