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Title: CURRENT TECHNICAL DEVELOPMENTS IN THE FIELD OF TRAFFIC LAW ENFORCEMENT
Accession Number: 00221320
Record Type: Component
Availability: Transportation Research Board Business Office 500 Fifth Street, NW Abstract: POLICE DEPARTMENTS NOW CONDUCT SIMPLE ENFORCEMENT SURVEYS TO DETERMINE HOW WELL TRAFFIC REGULATIONS ARE OBSERVED AND TO ASCERTAIN WHAT MEASURES SHOULD BE TAKEN ON REPORTED COMPLAINTS. TRAINING AMONG POLICE OFFICERS HAS BROADENED TO INCLUDE SUBJECTS OF A TECHNICAL NATURE. AMONG THE DEVICES DEVELOPED TO ASSIST TRAFFIC CONTROL ARE THOSE USED TO MEASURE SPEEDS. THE KANSAS CITY SPEED METER, MIRROR BOXES AND MORE RECENTLY, THE RADAR SPEED METER HAVE ALL FOUND INCREASING USE AMONG POLICE DEPARTMENTS. TO ASSIST POLICE IN MAKING COMPUTATIONS FOR PRE-ACCIDENT SPEEDS BASED ON SKIDMARKS, THE FEDERAL BUREAU OF INVESTIGATION HAS DEVELOPED A SIMPLE SPEED CALCULATOR WHICH ELIMINATES THE NECESSITY FOR LONG, COMPLICATED MATHEMATICAL COMPUTATIONS. THIS DEVICE CONSISTS OF TWO CONCENTRIC CIRCULAR DISKS WITH LOGARITHMIC SCALES. IT IS A SIMPLIFIED SLIDE-RULE ADAPTED FOR POLICE OFFICERS' SPECIAL USE. PROGRESS IS MADE IN THE SCIENTIFIC EXAMINATION AND ANALYSIS OF EVIDENCE FROM HIT-AND-RUN ACCIDENTS. THE SPECTROGRAPH, SPECTROPHOTOMETER, X-RAY DIFFRACTION SPECTROMETER, PETROGRAPHIC MICROSCOPE, COMPARISION MICROSCOPE AND REFRACTOMETERS ARE USED. THE SPECTROGRAPH DETERMINES THE QUANTITY AND TYPE OF METALLIC ELEMENTS CONTAINED IN A SUBSTANCE. THE SPECTROPHOTOMETER DISCLOSES UNKNOWN DYES AND COLORING AGENTS. EACH DYE OR COLORING AGENT IS IDENTIFIED BY A PARTICULAR TRANSMISSION CURVE, DETERMINED BY THIS EXAMINATION. THE X-RAY DIFFRACTION SPECTROMETER SUPPLEMENTS THE ANALYSIS OF EVIDENCE BY ASSISTING IN IDENTIFYING CRYSTALLINE MATERIAL. BY STUDYING THE CURVES OBTAINED WITH THIS INSTRUMENT, THE CRYSTALLINE SUBSTANCE CAN BE IDENTIFIED. BY MEANS OF THE PETROGRAPHIC MICROSCOPE AND REFRACTOMETERS, ROCKS, ROCK-FORMING MATERIALS AND SOILS ARE CLASSIFIED AND IDENTIFIED. THE STANDARD BINOCULAR MICROSCOPE AND THE COMPARISON MICROSCOPE ARE USED EXTENSIVELY TO AID IN EXAMINATIONS MADE WITH THE ABOVE INSTRUMENTS AND TO EXAMINE AND COMPARE HAIRS AND FIBERS FOUND ON A SUSPECT AUTOMOBILE WITH THOSE OBTAINED FROM THE VICTIM. /AUTHOR/
Supplemental Notes: Vol 29, pp 384-392, 2 FIG, 6 PHOT. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
Monograph Title: Monograph Accession #: 01490419
Authors: Kunz, F MEditors: Crum, Roy WBurggraf, FredCarey Jr, W NPublication Date: 1950
Serial:
Highway Research Board Proceedings
Volume: 29 Media Type: Digital/other
TRT Terms: Uncontrolled Terms: Old TRIS Terms: Subject Areas: Highways; Law; Operations and Traffic Management; Safety and Human Factors; Security and Emergencies
Files: TRIS, TRB
Created Date: Jul 25 1971 12:00AM
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