Journal of Transportation Engineering, Part A: Systems: Recent submissions
Now showing items 3721-3740 of 4147
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Integrated Traffic System
(American Society of Civil Engineers, 1990)The traffic congestion on our roads today is becoming a critical problem. There is increased fuel consumption as cars wait along poorly timed arterials. Safety is threatened as poor traffic flow leads to collisions. Transport ... -
Analysis of On‐Time Performance of Bus Services Using Simulation
(American Society of Civil Engineers, 1990)Applications of a microcomputer‐based Monte Carlo simulation model for analyzing the impact of different operating strategies (e.g., additional time points, bus priority, and demand profile) on two measures of quality of ... -
Structural Design of Concrete Block Pavements
(American Society of Civil Engineers, 1990)Several methods for designing concrete block pavements (CBP) for roads and streets are presently available. All recognize the need to consider the subgrade soil, paving materials, environment, and anticipated traffic. There ... -
Effect of Vehicle Size on Highway Capacity in Thailand
(American Society of Civil Engineers, 1990)Paper presents the results of a study undertaken to determine the capacity of an uninterrupted‐flow highway in Thailand. The effect of the size of vehicles on the capacity is also investigated. Passenger car equivalents ... -
Gridlock—Poll of Engineer's Perceptions
(American Society of Civil Engineers, 1990)Fifty‐nine urban transportation professionals replied to a survey on the approriate strategems to be employed in preventing severe traffic congestion. Personal philosohies on the engineer's past role in the problem's ... -
Design of Rigid Overlays for Airfields
(American Society of Civil Engineers, 1990)Current airfield overlay design generally uses empirical methods developed in the 1940s and 1950s. This paper presents a mechanistic overlay design procedure based on layered elastic theory as an alternative to the empirical ... -
Reliability Design Procedures for Flexible Pavements
(American Society of Civil Engineers, 1990)A procedure is developed to analyze layered elastic flexible pavement systems in terms of reliability. Rosenblueth's method is used to estimate the expected value and variance of the strains (dependent parameters), based ... -
Effects of Access Distance and Level of Service on Airport Choice
(American Society of Civil Engineers, 1990)Aviation growth over the last two decades has caused traffic volumes at many airports to attain near‐capacity levels. Demand management systems have been used to increase throughput and alleviate congestion where practical. ... -
Seismic Response of Elevated Steel Water Pipe
(American Society of Civil Engineers, 1990)Elevated steel water pipelines may be subjected to transverse and vertical seismic forces, and should be designed to withstand these forces safely. A specific elevated steel water pipeline is studied using a linear computer ... -
Variability Assessment for TRAF‐NETSIM
(American Society of Civil Engineers, 1990)The presence of high variability in traffic simulation results often leads to concern about their reliability, and consequently precludes a rigorous evaluation of the target traffic system's performance under various control ... -
Modeling Urban Spatial Evolution and Transport Demand
(American Society of Civil Engineers, 1990)The principal sources of error in the trip patterns estimated by cross‐sectional‐type trip distribution models are their inability to capture the spatial evolution of urban areas and the socioeconomic biases in the spatial ... -
Principles of Thermography and Radar for Bridge Deck Assessment
(American Society of Civil Engineers, 1990)Traditional methods of bridge deck condition assessment are slow, labor‐intensive, intrusive to traffic, and unreliable. Two new technologies, radar and infrared thermography, which have recently been introduced, show ... -
Structural Deterioration Model for Rigid Airfield Pavements
(American Society of Civil Engineers, 1990)Corps of Engineers accelerated traffic tests were reanalyzed to develop a structural deterioration model for airfield pavements. Test‐back performance was measured in terms of structural condition index varying from zero ... -
Progress of Road‐Automobile Communication System
(American Society of Civil Engineers, 1990)In Japan, the Public Works Research Institute of the Ministry of Construction has started the development of a road‐automobile communication system (RACS) under a joint research program with 25 private companies. The subject ... -
Roadway Electrification and Automation Technologies
(American Society of Civil Engineers, 1990)This paper explains how the new technologies of roadway electrification and automation can be applied to help alleviate the severe transportation/environmental/energy problems facing our major metropolitan areas. The ... -
Impact of Total Productivity Measurement on Automation in Bus Transit
(American Society of Civil Engineers, 1990)This paper is a result of a research project conducted in a Floridian county transit for one year. The primary objective of the paper is to present the study of the impact of automation on “total productivity” in bus ... -
Business View of Smart Vehicle‐Highway Control Systems
(American Society of Civil Engineers, 1990)Nontechnical concerns must be overcome before investors will give serious consideration to the large expenditures required for the development of smart vehicle‐highway control systems. The most important step would be the ... -
Advanced Vehicle Command and Control System (AVCCS)
(American Society of Civil Engineers, 1990)This paper explores the research under way in developing an autonomous vehicle command and control system; it also explains the means by which guidance is maintained and in‐yehicle navigation system are integrated into the ... -
FORTRAN Code for 1986 AASHTO Guide Equations
(American Society of Civil Engineers, 1990)Function subprograms are provided for the solution of the AASHTO equations for both flexible and rigid pavement design using the well known Newton-Raphson root finding numerical solution technique. The code was written for ... -
I.A.G.O.: Command Control Link Using Coded Waveguide
(American Society of Civil Engineers, 1990)For vehicular communications in automated transportation systems, a very important problem is to maintain high‐quality broadband communications at all locations. Furthermore, to achieve the automated navigation of vehicles, ...