Accuracy and Resolution of Surface Wave Inversion
Shear wave velocity profiles of soils and pavements may be evaluated nondestructively using surface wave tests such as the Spectral Analysis of Surface Waves (SASW) method. In these tests,...
Recent Advances in Cone Penetrometer Measurements (Software and Hardware) and Its Application to Liquefaction Susceptibility
Some of the recent advances made in Cone Penetration Test (CPT) data acquisition system and real time processing of CPT data are presented. A key component of the new CPT data acquisition...
Electronic Data Acquisition and Analysis for Soil Dynamics Applications
Recent advances in micro-computer-based data acquisition hardware and software systems have created a window of opportunity for the soil dynamics specialist. Increases in the number of...
Measuring Section-Related Traffic Data by Correlation Methods?A New Approach to Traffic Monitoring and Control
Traffic monitoring and control systems require reliable realtime data on traffic flow for an efficient performance. A new 'class' of data, the so-called section-related data such as journey...
Inductive Loop Detection/Testing with DSP Techniques
Vehicle traffic control is recognized as an effective way to relieve mounting traffic congestion in large urban areas across the country. The most common method of vehicle detection is...
Analysis of Roadside Equipment and Central Facilities for Innovative Driver Information and Traffic Control Systems
Following a top down analysis of a selected set of innovative RTI functions, we identify in this paper the requirements and characteristics of the roadside equipment and central installations...
SINOD?A Location Reference Tool for Road Information Systems
This paper focuses on the setting up of a location reference system - named SINOD - envisaged as a basic requirement for on going actions and for expected developments in the field of...
Application of Fuzzy Set Theory to the Analysis of Transportation Problems
The potential of applying fuzzy set theory is discussed. Fuzziness in the nature of transportation engineering problems is identified and typical fuzzy theory techniques are presented....
Traffic Queue Detection Using Image-Processing
A method of queue/congestion detection is described using low cost image processing and computing hardware. It is capable of processing data from a length of roadway within a few seconds,...
Automatic Object Identification in Road
The methodology for automatic object recognition in real road traffic environment is presented. The proposed data acquisition methods have been tested on site. In addition, the fundamental...
Two Approaches for Characterizing Images of Rail Surface Flaws
Rail surface flaws can be removed by grinding to improve the life of rail and provide a safe, smooth running surface. To avoid time consuming and costly visual inspection in the determination...
CADD?Database Application for Facility Inspections
In 1989, the Sverdrup Corporation was hired to perform the Comprehensive Inspection of the Queens-Midtown and Brooklyn-Battery tunnels in New York City. From the onset of the project it...
Automated Analysis of Pavement Distress Data
A system model that can be used for the analysis of pavement distress data collected by various visual devices (e.g. photographic film) is presented. The models operate at two levels:...
Traffic Control System on the Hanshin Expressway
The Hanshin Expressway Public Corporation, Osaka, Japan has been developing and operating its automated traffic control system since 1969. This paper deals with the latest version of the...
Contact-Free IC Cards for New Railway Ticket Systems
Two types of smart cards which can communicate with an automatic gate machine without contact are developed. The first one uses medium wave radio as communication media. The microprocessor...
NOAA Collection and Dissemination of Marine Information
The National Oceanic and Atmospheric Administration's (NOAA) interest in marinas stems from our mandate to foster boating safety through the issuance of marine navigation products and...
Automating Airfield Condition Data Collection
This paper discusses the advantages and disadvantages of the newest technology for the data collection requirements of an airport interested in implementing a pavement management system....
Geotechnical Engineering Congress?1991
This proceedings,
ASCE Salary Survey 1991
The 21st biennial ASCE salary survey of the engineering profession conducted by the ASCE Committee on Employment Conditions during the first half of 1991 is presented. It consists of an...
Autocorrelation Functions for Offshore Geotechnical Data
Autocorrelation functions are described. Data from several North Sea sites are analyzed with respect to the vertical and horizontal autocorrelation of a number of soil properties. Based...
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