Author : S. D. Howkins
Publisher :
Page : 106 pages
File Size : 39,17 MB
Release : 1968
Category : Pavements
ISBN :
The feasibility is investigated of various acoustic (sonic), nuclear, and electrical techniques for nondestructive measurement of Portland cement and bituminous concrete pavement thickness both during and after construction. Recommendations are made for equipment development and field testing of three specific methods that could potentially result in such measurements with the desired degree of speed and accuracy.
Author :
Publisher :
Page : 664 pages
File Size : 23,95 MB
Release : 1968
Category : Highway research
ISBN :
Issues for 1963- include section: Urban transportation research digest.
Author : Alvin George Anderson
Publisher :
Page : 90 pages
File Size : 20,96 MB
Release : 1970
Category : Automobile graveyards
ISBN :
The objective of this study was the development of criteria and design procedures for the use of aggregate riprap linings, which consists of a layer of discrete fragments of rock of sufficient size to resist the erosive forces of the flow. The design of such riprap-lined drainage channels involves the interrelationship between the discharge, the longitudinal slope, the size and shape of the channel, and the size distribution of the riprap lining. This report describes these interrelationships and develops design criteria by which a riprap-lined drainage channel can be proportioned and the riprap lining can be specified for a given discharge and longitudinal slope. The relationships so developed have been reduced to design charts, the use of which permits rapid and simple establishment of channel shape and size as well as of the properties of the riprap lining.
Author : United States. Bureau of Public Roads
Publisher :
Page : 172 pages
File Size : 46,72 MB
Release : 1966
Category :
ISBN :
Author :
Publisher :
Page : 172 pages
File Size : 27,80 MB
Release : 1966
Category : Highway research
ISBN :
Author : A. Kuprijanow
Publisher :
Page : 104 pages
File Size : 21,93 MB
Release : 1969
Category : Emergency medical services
ISBN :
This report will be of primary interest to highway administrators and traffic planners who are concerned about the present and future service demands on the Interstate Highway System. This study compares the availability and the demand for (a) emergency services which are those normally supplied by police, tow vehicles and ambulances; (b) normal services which are routine services such as gasoline, food and lodging, and (c) supplemental services which include rest areas, signing for directions and services and a choice of service types, brands, prices, etc. Recommendations are presented which should remove some of the deficiencies found by the researchers.
Author :
Publisher :
Page : 84 pages
File Size : 43,45 MB
Release : 1969
Category : Transportation
ISBN :
The current state of knowledge with both studded tire performance and methods of assessing pavement wear is reported. An annotated bibliography is presented of all known research on this subject from the U.S. and European sources, a review and evaluation of the data and results of completed studies and recommendations for future research. The objectives of the study were confined to the following tests: (1) correlation of data on the frictional characteristics of studded tires on ice, packed snow, and on bare pavements, and (2) development of a method, or methods, of quantitative assessment of the difference in wearing and abrasive effects of studded versus unstudded tires on different types of surfaces. A stud-resistance coefficient for operation on ice was derived and all U.S. data are correlated with this parameter and ice temperature.
Author : John D. Keane
Publisher :
Page : 80 pages
File Size : 14,18 MB
Release : 1969
Category : Technology & Engineering
ISBN :
A current state-of-the-art survey is presented with regard to painting of highway structural steel. A thorough literature review was conducted and an inspection and evaluation made of more than 4,000 paint exposure tests. Paint film thickness measurement studies were made. Specific recommendations are given for selecting typical paint systems on the basis of six environmental zones, which represent the range of severity of environment in which highway steel structures are located in the United States. Model specifications are suggested for surface preparation, application, material procurement, and paint system.
Author : John H. Brinton
Publisher :
Page : 104 pages
File Size : 45,10 MB
Release : 1969
Category : Technology & Engineering
ISBN :
Data were collected and disturbances were measured to determine the effects of physical disturbances by limited access highways on nearby property values. 3 types of analyses were made on the collected data: major-variable analysis, economic analysis, and interview analysis. In the major-variable analysis, relationships and correlations were examined between sound levels and sound level reductions at specific measurement points, and other variables such as sound level perception, present tree diversity, and homeowners' attitudes of buying another house next to the highway. The economic analysis evaluated the effect of highway disturbances and landscape/landforms on property values. The interview analysis was used to evaluate specific complaints or disturbances.
Author : Vogt, Ivers & Associates
Publisher :
Page : 88 pages
File Size : 41,86 MB
Release : 1969
Category : Express highways
ISBN :
A research study was conducted to define the social and economic factors affecting intercity travel and to use the resulting relationships with existing traffic prediction tools to predict intercity travel. Data used were the external origin-and-destination surveys of 22 cities. Another source of data was the U.S. census. Trip data from the origination-destination studies were summarized by trip purposes and by increasing time rings from the study area centroids. A stepwise regression analysis computer program was used to determine the relationship between trips and social and economic data. In an alternate analysis procedure, the survey data were utilized to determine the amount and characteristics of intercity trip generation.
