Showing papers in "Transportation Research in 1977"

TL;DR: In this paper, a feedback algorithm for driving a highway vehicle for minimum fuel consumption is developed, which allows the driver to choose an arbitrary steady state velocity for a level road, but modifies the speed for optimal fuel consumption on various grades.

TL;DR: The optimal control strategy with state variable constraints is studied and a numerical solution method is proposed for determining the optimal control for the case in which the intersection demand is predictable for the entire control period.

TL;DR: An optimizing model which minimizes average generalized trip cost subject to constraints on the entropy is shown to have the gravity model with exponential separation function as its solution.

TL;DR: In this paper, the authors generalize the results obtained by Daganzo (1977) in a previous paper by showing how to incorporate link capacities into any equilibrium traffic assignment algorithm and define an equivalent uncapacitated traffic equilibrium problem (EP).

TL;DR: In this paper, the authors empirically compare the competing assumptions concerning the relationships between transportation attitudes and behavior, and find that the relationship between attitudes and behaviour may be more complex than previously hypothesized.

TL;DR: In this article, the authors describe two related aspects of a transportation planning study recently completed for the Sudan, the use of scenarios and the prioritization of those scenarios and associated transport projects.

TL;DR: It is shown that coordination of the signals, according to analytical relationships developed here, is necessary for optimal operation and it is demonstrated that the entire congestion period must be divided into two intervals and that the optimal control in both intervals is determined by considering separate test functions.

TL;DR: In this article, a theory of transport demand from the viewpoint of the classical theory of the firm is presented, where a demand function for transport is developed not only with respect to transport rate, but also with regard to transport time, loss and damage rates, packing costs, etc.

TL;DR: In this paper, the authors assess the temporal stability of one type of person trip generation model (the category analysis model with the individual as the behavioural unit), some comparative studies based on the Reading Travel Surveys of 1962 and 1971 are described.

TL;DR: The approximation joint probability distribution function of the link traffic flows on a network is given, which enables the log-likehood function for the estimation (with link data) of the traffic diversion parameter, Ф, that appears in most stochastic assignment models.

TL;DR: In this paper, the authors present the approach and results of research recently undertaken in Australia which was designed to identify an extended set of attributes measured in "policy sensitive units" and the implications of the results for identifying a broad range of policy options are discussed.

TL;DR: The purpose of this paper is to extend Dial's algorithm by utilizing a simple model of tripmakers' perceptions and behavior, which is computationally equivalent to Dial's model and which can be implemented by making minor changes in his algorithm.

TL;DR: In this article, the number of crossing conflicts, at route intersections or route transitions, is shown to be expressable as a random sum of correlated random variables, and the variance of the conflict frequency may be considerably larger than that obtained by the Poisson assumption, which could explain some of the appreciable variability in air traffic controller work load.

TL;DR: The results of statistical analysis of the headway-speed variables in freely flowing freeway traffic are presented in this article, which consists of trajectories constructed from aerial photographs of the Long Island Expressway.

TL;DR: In this article, it is shown that it is possible to obtain a maximum likelihood estimation of the o parameter in Dial's assignment method without repeated application of the assignment algorithm implicit in the procedure introduced recently by Robillard (1974).

TL;DR: In this paper, a multinomial choice model is proposed to assess the impact of fare packages on traffic distributions and revenues, which is necessary to be able to model the choice process and to segment the total traffic into the different fare types available at any time.

TL;DR: The paper describes the basic problems and principles of route control by drawing together the conclusions from the previous work, and shows how they lead to the setting up of a series of routes control experiments, using simulation.

TL;DR: In this paper, a doubly-constrained trip-distribution model for possible use in both transportation planning and locational analysis is presented, and its flexibility derives from the special nature of the constraints that it satisfies.

TL;DR: It is proposed that classification of destinations (functional destinations) be used to define a common choice set of types of destination choice behaviour, starting from functional destinations down to the assignment of specific destinations.

TL;DR: In this paper, a procedure for minimizing the total delay at an intersection over a time period during which the expected approach flows may vary and there may be queuing is presented, and the procedure has provision for any short-term queuing inherent in a global optimal solution, and for varying the green split as the demands vary.

TL;DR: In this paper, a mathematical generalization of user benefits from n highways, and the integrability assumption necessary to preserve the interpretation of benefits as areas under ordinary travel demand curves is presented.

TL;DR: The results of these experiments show that substantial savings in average total journey time could be obtained by the use of route control rather than area traffic control alone.

TL;DR: In this paper, a simple stochastic model for freeway traffic is formulated as follows: each vehicle passing a fixed point in a given lane is assigned as F (follower) or L (leader) with probabilities p, 1 − p.

TL;DR: In this paper, a theoretical rationale for the hypothesis that the energy crisis has induced an increase in the demand for fuel efficiency as a characteristic of aircraft and empirically tests this hypothesis with data from the U.S. general aviation market.

TL;DR: In this article, a case study involving a small airline serving three cities was made to determine an optimal scheduling policy, which was necessary to evaluate the profitability of alternate routings involving nonstop and one stop flights by determining the net contribution to profit of each alternative.

TL;DR: In this paper, market segmentation techniques are used to capture effects of opportunity and availability constraints on urban residents' choice of mode for trips for major grocery shopping and for visiting friends and acquaintances.

TL;DR: In this article, a mathematical model of the traffic pattern on two-lane highways having no structural obstacles to impede overtaking is presented, based on a queueing analogy of the process of overtaking.

TL;DR: Ways of using the techniques to best advantage in assessing the traffic capacity of signal-controlled junctions and in calculating signal settings to maximize capacity or to minimize delay are described.