Pub Date : 1955-01-01DOI: 10.1016/b978-0-444-41283-6.50026-5
A. Remillon
{"title":"STABILIZATION OF LATERITE SOILS","authors":"A. Remillon","doi":"10.1016/b978-0-444-41283-6.50026-5","DOIUrl":"https://doi.org/10.1016/b978-0-444-41283-6.50026-5","url":null,"abstract":"","PeriodicalId":12918,"journal":{"name":"Highway Research Board bulletin","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1955-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74396378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
THIS PAPER DESCRIBES SOME EXPEDIENT APPLICATIONS OF ELEMENTARY OPTICAL PRINCIPLES TO THE EVALUATION OF GLASS-BEAD REFLECTORIZING SYSTEMS FOR HIGHWAY SIGNS AND MARKERS. THE OPTICAL FUNCTION OF SPHERICAL LENSES IN ACHIEVING REFLEX REFLECTION IS ILLUSTRATED BOTH PHOTOGRAPHICALLY AND DIAGRAMMATICALLY. VARIOUS OPTICAL DESIGNS ARE DISCUSSED AND ANALYZED. BY SIMPLE GEOMETRIC OPTICS, THE EFFICIENCY OF THESE SYSTEMS IS CORRELATED WITH THE PRACTICAL PERFORMANCE CRITERIA FOR RETRODIRECTIVE REFLECTORIZATION. /AUTHOR/
{"title":"Spherical lens optics applied to retrodirective reflection","authors":"J. H. Havens, A. C. Peed","doi":"10.13023/KTC.RR.1951.74","DOIUrl":"https://doi.org/10.13023/KTC.RR.1951.74","url":null,"abstract":"THIS PAPER DESCRIBES SOME EXPEDIENT APPLICATIONS OF ELEMENTARY OPTICAL PRINCIPLES TO THE EVALUATION OF GLASS-BEAD REFLECTORIZING SYSTEMS FOR HIGHWAY SIGNS AND MARKERS. THE OPTICAL FUNCTION OF SPHERICAL LENSES IN ACHIEVING REFLEX REFLECTION IS ILLUSTRATED BOTH PHOTOGRAPHICALLY AND DIAGRAMMATICALLY. VARIOUS OPTICAL DESIGNS ARE DISCUSSED AND ANALYZED. BY SIMPLE GEOMETRIC OPTICS, THE EFFICIENCY OF THESE SYSTEMS IS CORRELATED WITH THE PRACTICAL PERFORMANCE CRITERIA FOR RETRODIRECTIVE REFLECTORIZATION. /AUTHOR/","PeriodicalId":12918,"journal":{"name":"Highway Research Board bulletin","volume":"141 1","pages":"66-77"},"PeriodicalIF":0.0,"publicationDate":"1952-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86387325","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
PHYSICAL AND OPTICAL CHARACTERISTICS OF SIGN MATERIALS AND DESIGN AND APPLICATION OF A REFLECTOMETER DEVISED BY THE KENTUCKY DEPARTMENT OF HIGHWAYS ARE DISCUSSED. ACCELERATED WEATHERING PROCEDURES AND SPECIFICATION STANDARDS ARE DESCRIBED. FIELD STUDIES PARALLELING LABORATORY WORK AND A POSSIBLE CORRELATION BETWEEN THE TWO ARE DESCRIBED. THE FIELD WORK INCLUDED SEVERAL THOUSAND INDIVIDUAL OBSERVATIONS COVERING 30 DIFFERENT SIGN-SURFACE TYPES UNDER ACTUAL CONDITIONS ON A NIGHT-VISIBILITY DRIVING-COURSE. MOST OF THE MAJOR TYPES OF SURFACES AVAILABLE WERE REPRESENTED. IN ADDITION TO USING ORDINARY SEALED-BEAM HEADLAMPS, FIELD OBSERVATIONS WERE MADE USING POLARIZED HEADLAMPS AND VIEWERS. /AUTHOR/
{"title":"FIELD AND LABORATORY EVALUATION OF ROADSIDE SIGN SURFACING MATERIALS","authors":"J. H. Havens, A. C. Peed","doi":"10.13023/KTC.RR.1951.63","DOIUrl":"https://doi.org/10.13023/KTC.RR.1951.63","url":null,"abstract":"PHYSICAL AND OPTICAL CHARACTERISTICS OF SIGN MATERIALS AND DESIGN AND APPLICATION OF A REFLECTOMETER DEVISED BY THE KENTUCKY DEPARTMENT OF HIGHWAYS ARE DISCUSSED. ACCELERATED WEATHERING PROCEDURES AND SPECIFICATION STANDARDS ARE DESCRIBED. FIELD STUDIES PARALLELING LABORATORY WORK AND A POSSIBLE CORRELATION BETWEEN THE TWO ARE DESCRIBED. THE FIELD WORK INCLUDED SEVERAL THOUSAND INDIVIDUAL OBSERVATIONS COVERING 30 DIFFERENT SIGN-SURFACE TYPES UNDER ACTUAL CONDITIONS ON A NIGHT-VISIBILITY DRIVING-COURSE. MOST OF THE MAJOR TYPES OF SURFACES AVAILABLE WERE REPRESENTED. IN ADDITION TO USING ORDINARY SEALED-BEAM HEADLAMPS, FIELD OBSERVATIONS WERE MADE USING POLARIZED HEADLAMPS AND VIEWERS. /AUTHOR/","PeriodicalId":12918,"journal":{"name":"Highway Research Board bulletin","volume":"325 1","pages":"32-44"},"PeriodicalIF":0.0,"publicationDate":"1951-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80355334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1949-01-01DOI: 10.13023/KTC.RR.1949.53A
J. L. Young, L. Gregg
IN MATERIALS SURVEYING, GEOLOGY SHOULD BE OF MAXIMUM BENEFIT, NOT AS A COMPLETE INFORMANT BUT AS A FOUNDATION FOR RECONNAISSANCE, ASSEMBLY, AND CATALOGING OF MATERIALS. GEOLOGY IN ESSENCE IS A MATERIALS SURVEY ON A GRAND SCALE. USE OF THIS SCIENCE FOR ENGINEERING PURPOSES INVOLVES SOME PRIMARY KNOWLEDGE OF GEOLOGIC NOMENCLATURE, THE BASIC HISTORIC APPROACH OF GEOLOGISTS, AND THE USE OF RESOURCES AND DATA PUBLISHED BY STATE, FEDERAL, AND PRIVATE AGENCIES OVER A PERIOD OF 75 YEARS. RECOGNITION OF THE NEED FOR INFORMATION ON SURFACE CONDITIONS AS AN AID TO ENGINEERING AND ALLIED SCIENCES IS EMPHASIZED, AND IN RESPONSE TO THIS NEED, A NEW SYSTEM OF MAPPING IS CITED AND ILLUSTRATED IN WHICH A SPECIAL MAP OF SURFICIAL GEOLOGY IS PREPARED IN CONJUNCTION WITH THE TRADITIONAL 'BEDROCK' GEOLOGIC MAPS. THE IMPORTANCE AND THE DIFFICULTY OF CONVERTING GEOLOGIC DATA TO ENGINEERING USES ARE CONSIDERED, AND IN LIEU OF A UNIVERSALLY SATISFACTORY MEANS FOR ACCOMPLISHING THIS, A FEW SPECIFIC CONVERSIONS ARE DISCUSSED AND ILLUSTRATED. EACH IS CONSIDERED SEPARATELY FROM THE STANDPOINT OF POSSIBLE MATERIALS REQUIREMENTS AND THE APPLICATION OF GEOLOGIC METHODS TO THE LOCATION OF USABLE MATERIALS. /AUTHOR/
{"title":"Geologic Considerations in Relation to a Materials Survey","authors":"J. L. Young, L. Gregg","doi":"10.13023/KTC.RR.1949.53A","DOIUrl":"https://doi.org/10.13023/KTC.RR.1949.53A","url":null,"abstract":"IN MATERIALS SURVEYING, GEOLOGY SHOULD BE OF MAXIMUM BENEFIT, NOT AS A COMPLETE INFORMANT BUT AS A FOUNDATION FOR RECONNAISSANCE, ASSEMBLY, AND CATALOGING OF MATERIALS. GEOLOGY IN ESSENCE IS A MATERIALS SURVEY ON A GRAND SCALE. USE OF THIS SCIENCE FOR ENGINEERING PURPOSES INVOLVES SOME PRIMARY KNOWLEDGE OF GEOLOGIC NOMENCLATURE, THE BASIC HISTORIC APPROACH OF GEOLOGISTS, AND THE USE OF RESOURCES AND DATA PUBLISHED BY STATE, FEDERAL, AND PRIVATE AGENCIES OVER A PERIOD OF 75 YEARS. RECOGNITION OF THE NEED FOR INFORMATION ON SURFACE CONDITIONS AS AN AID TO ENGINEERING AND ALLIED SCIENCES IS EMPHASIZED, AND IN RESPONSE TO THIS NEED, A NEW SYSTEM OF MAPPING IS CITED AND ILLUSTRATED IN WHICH A SPECIAL MAP OF SURFICIAL GEOLOGY IS PREPARED IN CONJUNCTION WITH THE TRADITIONAL 'BEDROCK' GEOLOGIC MAPS. THE IMPORTANCE AND THE DIFFICULTY OF CONVERTING GEOLOGIC DATA TO ENGINEERING USES ARE CONSIDERED, AND IN LIEU OF A UNIVERSALLY SATISFACTORY MEANS FOR ACCOMPLISHING THIS, A FEW SPECIFIC CONVERSIONS ARE DISCUSSED AND ILLUSTRATED. EACH IS CONSIDERED SEPARATELY FROM THE STANDPOINT OF POSSIBLE MATERIALS REQUIREMENTS AND THE APPLICATION OF GEOLOGIC METHODS TO THE LOCATION OF USABLE MATERIALS. /AUTHOR/","PeriodicalId":12918,"journal":{"name":"Highway Research Board bulletin","volume":"39 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1949-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80165337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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