Journal of Transportation Engineering, Part A: Systems: Recent submissions
Now showing items 3641-3660 of 4147
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Laboratory versus Nondestructive Testing for Pavement Design
(American Society of Civil Engineers, 1992)A detailed comparison of moduli measured in the laboratory by resilient modulus testing with moduli measured in the field by falling weight deflec‐tometer (FWD) testing is made. This comparison includes an analysis of ... -
AASHTO Direct Structural Capacity Method Error Analysis
(American Society of Civil Engineers, 1992)The AASHTO Direct Structural Capacity method utilizes an approximate composite pavement modulus to predict an effective structural number based on deflection measurements. An analysis of the errors associated with the ... -
Road Aggregate Choice Based on Silicate Quality and Bitumen Adhesion
(American Society of Civil Engineers, 1992)An adsorption mechanism of bitumen onto the silicate surface is presented. Amines are capable of acting as adhesion agents on siliceous surfaces and the carboxylic acids on carbonate stones. An acid adsorbate, tall‐oil ... -
Distributed Approach to Optimized Control of Street Traffic Signals
(American Society of Civil Engineers, 1992)The paper describes our long‐term activity aimed at the control of traffic signals by a network of distributed processors situated at street intersections. Every processor runs an identical expert system and communicates ... -
Field Test of 72‐in.‐Diameter Cast‐in‐Place Nonreinforced Concrete Pipe
(American Society of Civil Engineers, 1992)Monolithic nonreinforced cast‐in‐place concrete pipe (CIPCP) for storm drain, sewerage, and low‐head irrigation pipelines has been in existence since 1954. This is a report on a field test of 72‐in. inside diameter (ID) ... -
Closure to “<i>Pipe/Soil Stiffness Ratio Effect on Flexible Pipe Buckling Threshold</i>” by Kenneth K. Kienow and Robert C. Prevost (March, 1989, Vol. 115, No. 2)
(American Society of Civil Engineers, 1992) -
Procedures for Estimating Accident Reductions on Two‐Lane Highways
(American Society of Civil Engineers, 1992)Accident prediction models or the before‐and‐after study approach is commonly used to estimate the reduction in number of accidents resulting from highway improvements. The highway improvement evaluation results will depend ... -
Method for Preevaluation and Selection of Road Projects in Gabon
(American Society of Civil Engineers, 1992)A method for preevaluation and selection of road projects in the open country adapted to the particular conditions of Gabon is presented. This method is both the most complete possible given the state of current knowledge, ... -
Total Productivity Measurement in Bus Transit: Comment
(American Society of Civil Engineers, 1991)This technical note comments on a 1990 paper by Sumanth and Adya that appeared in this journal. In that paper the authors determined total productivity and showed how innovations occurring in transit systems they analyzed ... -
Discussion of “<i>Pipe/Soil Stiffness Ratio Effect on Flexible Pipe Buckling Threshold</i>” by Kenneth K. Kienow and Robert C. Prevost (March, 1989, Vol. 115, No. 2)
(American Society of Civil Engineers, 1992) -
Estimating Truck's Critical Cornering Speed and Factor of Safety
(American Society of Civil Engineers, 1992)Fully laden trucks are prone to rollover when exceeding a critical cornering speed. After an accident, authorities, both highway engineers and the police, often need to establish a vehicle's speed from tire marks and other ... -
Urban Transit Guides Application of Advanced Train Control
(American Society of Civil Engineers, 1992)North American railway authorities are concerned about the introduction of processor‐based equipment, which often does not fit existing rules, into vital or fail‐safe functions. This situation has already been faced in the ... -
Method for Grading Design of Highways
(American Society of Civil Engineers, 1991)Preparing the grading plan of a highway and/or an intersection is an effective way to obtain a ``three dimensional'' view of the entire design area, and to check and possibly modify alignments, profiles, slopes, drainage ... -
Field Effects of Water Pumping Beneath Concrete Pavement Slabs
(American Society of Civil Engineers, 1991)Water pumping beneath concrete pavement slabs is considered to be a major cause of pavement failure. The objectives of this work are to determine typical water pressures and velocities during pumping in the field as well ... -
Use of FWD Data for Pavement Material Characterization and Performance
(American Society of Civil Engineers, 1991)Conventionally used FWD backcalculation and pavement stress‐strain computation procedures are based on linear static layered elastic theory. This paper presents a simple hypothetical case study in which the applicability ... -
Aspects of Highway Superelevation Design
(American Society of Civil Engineers, 1991)The method of calculating superelevation in highway curves and its effects on vehicle dynamics and safety is of great importance in highway design. United States and German guidelines' relevant methods are presented and ... -
Traffic Conflicts in Expressway Merging
(American Society of Civil Engineers, 1991)The risk of collision in an expressway merging process is investigated using the traffic conflict technique. The severity of conflict in a merging event is quantified by a measure that is the inverse of the time measured ... -
New Highway Uses for AVI Systems
(American Society of Civil Engineers, 1991)Automatic vehicle identification (AVI) is the process and technology by which vehicles arc uniquely identified without any action being required of the driver or by wayside observers. The present status of AVI systems for ... -
Traffic Assignment in Practice: Overview and Guidelines for Users
(American Society of Civil Engineers, 1991)This paper presents an overview of the elements of traffic assignment and a synthesis of the problems that may be encountered in applying traffic‐assignment models in practice. The elements include preparing the transportation ... -
Effects of Pavement Age and Traffic on Maintenance Effectiveness
(American Society of Civil Engineers, 1991)An evaluation of the effects of pavement age and traffic loading on routine maintenance effectiveness is presented. A conceptual framework for the evaluation was developed. Change in surface roughness was considered a ...