probit-based traffic assignment: a comparative study between link-based simulation algorithm and path-based assignment and generalization to random-coefficient approach

نویسندگان

milad haghani

zahra shahhoseini

majid sarvi

چکیده

probabilistic approach of traffic assignment has been primarily developed to provide a more realistic and flexible theoretical framework to represent traveler’s route choice behavior in a transportation network. the problem of path overlapping in network modelling has been one of the main issues to be tackled. due to its flexible covariance structure, probit model can adequately address the problem. despite that probit is one of the most appealing choice models, due to the lack of closed form expressions for evaluating choice probabilities; it has not received extensive attention by network modeling researchers. this study is set out to focus on this approach of traffic assignment. computational difficulty of application of probit model in the large-scale network equilibrium problem has triggered development of some link-based probit network loading methods which exempt the analyst from generating and maintaining path-flow variables explicitly. to the best of our knowledge, however, the bias of these heuristic link-based methods has not been studied so far. this contribution primarily focuses on investigation of such potential bias in link-based probit assignment methods. in this research, this bias for a certain simulated link-based method proposed in the literature is empirically considered and investigated through comparison with path-based probit equilibrium solution. our findings indicate considerable level of bias for the examined link-based algorithm. capable of representing utility correlation and heteroscedasticity, probit model has always been one of the most theoretically attractive models for representing route choice behavior. however, this soundness of theory could further be enhanced through combining the ideas of probit and random-coefficient modeling which enables the analyst to capture random taste heterogeneity over travelers as well. to do this, the notion of mixed probit model, as a generalization to classical fixed-coefficient probit, is introduced and applied to an illustrative network in this study, in addition to the main contribution of the article.

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Probit-Based Traffic Assignment: A Comparative Study between Link-Based Simulation Algorithm and Path-Based Assignment and Generalization to Random-Coefficient Approach

Probabilistic approach of traffic assignment has been primarily developed to provide a more realistic and flexible theoretical framework to represent traveler’s route choice behavior in a transportation network. The problem of path overlapping in network modelling has been one of the main issues to be tackled. Due to its flexible covariance structure, probit model can adequately address the pro...

متن کامل

task-based language teaching in iran: a mixed study through constructing and validating a new questionnaire based on theoretical, sociocultural, and educational frameworks

جنبه های گوناگونی از زندگی در ایران را از جمله سبک زندگی، علم و امکانات فنی و تکنولوژیکی می توان کم یا بیش وارداتی در نظر گرفت. زبان انگلیسی و روش تدریس آن نیز از این قاعده مثتسنی نیست. با این حال گاهی سوال پیش می آید که آیا یک روش خاص با زیر ساخت های نظری، فرهنگی اجتماعی و آموزشی جامعه ایرانی سازگاری دارد یا خیر. این تحقیق بر اساس روش های ترکیبی انجام شده است.پرسش نامه ای نیز برای زبان آموزان ...

construction and validation of a computerized adaptive translation test (a receptive based study)

آزمون انطباقی رایانه ای (cat) روشی نوین برای سنجش سطح علمی دانش آموزان می باشد. در حقیقت آزمون های رایانه ای با سرعت بالایی به سمت و سوی جایگزین عملی برای آزمون های کاغذی می روند (کینگزبری، هاوسر، 1993). مقاله حاضر به دنبال آزمون انطباقی رایانه ای برای ترجمه می باشد. بدین منظور دو پرسشنامه مشتمل بر 55 تست ترجمه میان 102 آزمودنی و 10 مدرس زبان انگلیسی پخش گردید. پرسشنامه اول میان 102 دانشجوی س...

Dynamic Path-Based Equilibrium Assignment With Microscopic Traffic Simulation

The contents of this report reflect the views of the authors who are responsible for the facts and the accuracy of the data presented herein. The contents do not necessarily reflect the official views or policies of the State of California. This report does not constitute a standard, specification, or regulation. Under this task order, the California ATMS testbed hosted two full-time PATH resea...

متن کامل

RANDOM AND CUTOFF - BASED ASSIGNMENT 1 Running Head : RANDOM AND CUTOFF - BASED ASSIGNMENT A Randomized Experiment Comparing Random to Cutoff - Based Assignment

Regression discontinuity designs (RDD) assign participants to conditions using a cutoff score, with those above the cutoff going to one condition and those below to another. Statistical theory shows that a correctly implemented and analyzed RDD gives unbiased effect estimates, just as in a randomized experiment. This study tests that theory by randomly assigning 588 participants to be in a rand...

متن کامل

On Calibration and Application of Logit-Based Stochastic Traffic Assignment Models

There is a growing recognition that discrete choice models are capable of providing a more realistic picture of route choice behavior. In particular, influential factors other than travel time that are found to affect the choice of route trigger the application of random utility models in the route choice literature. This paper focuses on path-based, logit-type stochastic route choice models, i...

متن کامل

منابع من

با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید


عنوان ژورنال:
international journal of transportation engineereing

ناشر: tarrahan parseh transportation research institute

ISSN 2322-259X

دوره 2

شماره 3 2015

میزبانی شده توسط پلتفرم ابری doprax.com

copyright © 2015-2023