Journal of Transportation Engineering, Part A: Systems: Recent submissions
Now showing items 3441-3460 of 4147
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Macrolevel Estimation of Highway Lane Usage
(American Society of Civil Engineers, 1995)A methodology is proposed and simple models are developed that estimate on a macrolevel the traffic volume distribution in highways lanes. The testing of the methodology and the models' calibration were done for different ... -
Innovation in Rapid Transit: Historical Case Study
(American Society of Civil Engineers, 1995)A historical case study is made of the technological innovation and operating practices used by a large transit operator during the first half of this century. This survey can benefit present-day planners, engineers, and ... -
Optimization Models for Transportation Project Programming Process
(American Society of Civil Engineers, 1995)Five optimization models are constructed for selecting an optimal subset of projects submitted for a statewide programming process. Our approach develops models that are consistent with user needs and appropriate for the ... -
Analysis and Verification of Thermal-Gradient Effects on Concrete Pavement
(American Society of Civil Engineers, 1995)An experimental and analytical study was conducted to develop an effective method for determining realistic thermal-load induced stresses in concrete pavements. Temperatures throughout the concrete slabs were measured over ... -
Capacity-Allocation Methods for Reducing Urban Traffic Congestion
(American Society of Civil Engineers, 1995)It is unlikely that roadway construction or vehicle automation will be able to alleviate most major urban congestion in the near future (5–15 years). What else can be done to reasonably reduce congestion? Several approaches ... -
Planning and Design of Passing Lanes Using Simulation Model
(American Society of Civil Engineers, 1995)The present paper describes the planning and preliminary design of passing lanes in difficult terrain in Southern California and is based on an investigation of approximately 560 km (350 mi) of two-lane highways in Imperial, ... -
Proposed Uniform Scale for Stiffness of Unbound Pavement Materials for Pavement Design
(American Society of Civil Engineers, 1994)A review of several relationships commonly used by pavement engineers for structural characterization of subgrade soils, subbase, and base is presented. A careful examination of the literature on the subject revealed that ... -
Resilient Moduli of Granular Materials
(American Society of Civil Engineers, 1994)The six most commonly encountered aggregates that are used as subbases/bases of roadways in Oklahoma were selected and tested under cyclic loading to evaluate the Resilient Modulus (RM) by using the AASHTO T292‐91I and ... -
Structuring Category Analysis Using Statistical Technique
(American Society of Civil Engineers, 1994)The transportation‐planning process incorporates the development of representative‐trip‐generation models from base year data for making forecasts of travel in subsequent years. Category analysis is a technique based on ... -
Network Design Effects of Dynamic Traffic Assignment
(American Society of Civil Engineers, 1995)This paper examines the effects of dynamic user-equilibrium (DUE) traffic assignment with scheduled trip arrival times on network design outcomes in comparison to outcomes with steady-state travel demands. The objective ... -
Interactive Design of Service Routes
(American Society of Civil Engineers, 1994)The design of transportation‐network service routes is both combinatorially complex and fraught with multiple and conflicting management objectives. The focus of this work is the design and development of a computer‐aided ... -
Dwell‐Time Effects of Low‐Floor Bus Design
(American Society of Civil Engineers, 1994)The low‐floor bus design is generally recognized as an effective tool for serving the population of transit passengers with disabilities. This design, in which the main platform is reached with a single step from curb ... -
Systems‐Level Evaluation of Automated Urban Freeways
(American Society of Civil Engineers, 1994)The automation of urban freeways is a major feature of the new surface transportation act. Reducing freeway congestion can be presumed to have drawbacks, however, in terms of induced travel and possibly greater travel costs ... -
Comparison of Nuclear and Core Pavement Density Measurements
(American Society of Civil Engineers, 1994)Quality of highway construction is a major concern for highway agency engineers and contractors, and density of asphalt‐concrete pavement is one of the primary quality‐control parameters. The present study evaluates the ... -
Validation of Knowledge‐Based System with Multiple Bridge Rail Experts
(American Society of Civil Engineers, 1994)A procedure is described that can be used to validate a knowledge‐based expert system. The method applies four qualitative measures that are specially designed for problems solved by multiple levels of experts whose authority ... -
Computer Vision System for Automatic Vehicle Classification
(American Society of Civil Engineers, 1994)In the present paper, a computer vision system composed of five models is proposed for vehicle classification. The five models are: (1) The perspective projection model; (2) the length measurement model; (3) the width and ... -
Investigation of Conflict Characteristics at Airway Intersections
(American Society of Civil Engineers, 1994)Congestion of aircraft traffic along airways and in the terminal areas of large airports has significantly increased in recent years. To handle the new levels of congestion in the skies a better understanding of air conflicts ... -
Optimum Curvature for Simple Horizontal Curves
(American Society of Civil Engineers, 1994)A model based on an expected total‐cost minimization approach is developed for determining the optimal‐degree curvature of simple horizontal curves on undivided two‐lane highways. Expected total cost is defined as the sum ... -
Closure to “<i>Warping Stresses in Concrete Pavements on Pasternak Foundation</i>” by X. P. Shi, T. F. Fwa, and S. A. Tan (November/December, 1993, Vol. 119, No. 6)
(American Society of Civil Engineers, 1994) -
Technologies for Planning Railroad Track Maintenance and Renewal
(American Society of Civil Engineers, 1994)Rail continues to be an important transportation mode. Like other transportation infrastructure, maintenance and replacement are critical to ensure safe, efficient operation. Research and development of technologies for ...