Transportation Research Record

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Pavement Structural Capacity from Traffic Speed Deflectometer for Network Level Pavement Management System Application
Transportation Research Record - Tập 2673 Số 2 - Trang 456-465 - 2019
Mahdi Nasimifar, Senthilmurugan Thyagarajan, Sarah Chaudhari, Nadarajah Sivaneswaran
Structural number (SN) represents the structural capacity of a flexible pavement system to sustain anticipated traffic and is among the structural indices most commonly used by pavement design engineers in the U.S. Effective structural number (SNeff) is an indicator of structural capacity of in-service pavement sections and is conventionally estimated from nondestructive testing (NDT) device data ... hiện toàn bộ
Simple Approach to Estimation of Pavement Structural Capacity
Transportation Research Record - Tập 1652 Số 1 - Trang 198-205 - 1999
Stefan A. Romanoschi, J B Metcalf
The use of the falling weight deflectometer (FWD) as a tool for investigating the structural strength of flexible and rigid pavements is now common. The backcalculation of layer moduli is the primary technique for data interpretation. This technique is cumbersome and expensive to apply to low-volume roads. A simple way of relating the FWD surface deflections to the performance of pavement structur... hiện toàn bộ
Comparative Analysis of Field Permeability Testing of Compacted Hot-Mix Asphalt Pavements
Transportation Research Record - Tập 1946 Số 1 - Trang 147-156 - 2006
Jacques Menard, James A Crovetti
The in-place permeability of asphalt pavements has been the focus of recent research as investigators try to establish links between pavement permeability and performance. Previous research concluded that pavements with in-place air voids exceeding 8% to 10% may be considered as excessively permeable, and it is generally accepted that excessively permeable pavements are more prone to oxidation and... hiện toàn bộ
Testing for the Significance of Induced Highway Travel Demand in Metropolitan Areas
Transportation Research Record - Tập 1706 Số 1 - Trang 1-8 - 2000
Lawrence C. Barr
A research study was conducted to evaluate and quantify the effect of highway capacity improvements on travel demand. Statistical models using Nationwide Personal Transportation Survey data were designed to estimate relationships between average household travel time and vehicle-miles of travel. Several regression models were estimated, and the results were stratified by urbanized area, public tra... hiện toàn bộ
Urban Form and Vehicular Travel: Some Empirical Findings
Transportation Research Record - Tập 1617 Số 1 - Trang 18-27 - 1998
Eric J. Miller, Amal Ibrahim
Some empirical findings are presented on the relationship between urban form and work trip commuting efficiency, drawn from the analysis of 1986 work trip commuting patterns in the greater Toronto area. Work trip commuting efficiency is measured with respect to the average number of vehicle kilometers traveled (VKT) per worker in a given zone. Preliminary findings include VKT per worker increases ... hiện toàn bộ
Household Motor Vehicle Ownership and Use: How Much Does Residential Density Matter?
Transportation Research Record - Tập 1552 - Trang 120-125 - 1996
Paul Schimek
Travel and the Built Environment: A Synthesis
Transportation Research Record - Tập 1780 Số 1 - Trang 87-114 - 2001
Reid Ewing, Robert Cervero
The potential to moderate travel demand through changes in the built environment is the subject of more than 50 recent empirical studies. The majority of recent studies are summarized. Elasticities of travel demand with respect to density, diversity, design, and regional accessibility are then derived from selected studies. These elasticity values may be useful in travel forecasting and sketch pla... hiện toàn bộ
Machine Learning Travel Mode Choices: Comparing the Performance of an Extreme Gradient Boosting Model with a Multinomial Logit Model
Transportation Research Record - Tập 2672 Số 47 - Trang 35-45 - 2018
Fangru Wang, Catherine L. Ross
The multinomial logit (MNL) model and its variations have been dominating the travel mode choice modeling field for decades. Advantages of the MNL model include its elegant closed-form mathematical structure and its interpretable model estimation results based on random utility theory, while its main limitation is the strict statistical assumptions. Recent computational advancement has allowed eas... hiện toàn bộ
Built Environment and School Travel Mode Choice in Toronto, Canada
Transportation Research Record - Tập 2156 Số 1 - Trang 150-159 - 2010
Raktim Mitra, Ron Buliung, Matthew J. Roorda
Walking to or from school may provide a regular source of physical activity for children and youth. To improve walking practices among this younger population, urban planners emphasize the importance of built environment interventions. Empirical understanding of the potential relationship between the built environment and active school transportation (e.g., walking) is therefore essential to the d... hiện toàn bộ
Validation of High-Fidelity Traffic Simulation Models
Transportation Research Record - Tập 1710 Số 1 - Trang 69-78 - 2000
Lei Rao, Larry E. Owen
A multistage validation framework that accounts for the realistic nature of traffic simulation output data is proposed. The framework consists of conceptual validation and operational validation. The operational validation comprises a qualitative approach, which involves static and animated Turing tests, and a quantitative approach, which involves three levels of statistical tests. Particularly in... hiện toàn bộ
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