00223532

Component

https://onlinepubs.trb.or...bproceedings/37/37-020.pdf

PAYLOAD WEIGHTS AND GROSS VEHICLE WEIGHTS ARE RELATED TO THE SHIPPING DENSITIES OF COMMODITIES HAULED AND TO THE CARGO VOLUME CAPACITIES OF FREIGHT VEHICLES. WITHIN THESE FACTORS LIE THE PRESSURES FOR INCREASED WEIGHT ALLOWANCES FOR LINE HAUL HIGHWAY FREIGHT SERVICE. ONE PHASE OF THE COMMITTEE'S STUDY WAS TO DETERMINE THE WEIGHT DEMAND PATTERN OF FREIGHT TRANSPORTED BY HIGHWAY. SUCH DATA PREVIOUSLY HAVE NOT BEEN AVAILABLE. THE COLLECTION OF A GREAT AMOUNT OF COMMODITY DATA IS REPORTED IN THE PAPER, INCLUDING SHIPPING DENSITIES (POUNDS PER CUBIC FOOT) OF ALL CLASSES OF FREIGHT, AND THE TONNAGES OF EACH CLASS OF COMMODITIES THAT WERE TRANSPORTED IN 1954 BY EACH OF THE FIVE MAIN MEDIA OF TRANSPORTATION IN THE UNITED STATE (RAILROAD, HIGHWAY, INLAND WATERWAY, PIPELINE, AND AIRWAY). REPORTED IN DETAIL ARE THE TONNAGES AND SHIPPING DENSITIES OF THE COMMODITIES MOVED BY LINE HAUL HIGHWAY FREIGHT. THE CHARTS OF THESE DATA INDICATE THAT A PREPONDERANCE OF THE GENERAL FREIGHT LIES IN THE RANGE OF SHIPPING DENSITIES BETWEEN 25 AND 50 PCF. FOR FLOWABLE COMMODITIES THE SHIPPING DENSITIES ARE STILL HEAVIER. APPROXIMATELY 48 PERCENT OF THE HIGHWAY FREIGHT WEIGHS LESS THAN 50 PCF, WHEREAS ONLY 9 PERCENT OF HIGHWAY FREIGHT WEIGHS LESS THAN 25 PCF. THE REPORT DISCUSSES THE IMPLICATIONS THAT ARISE WHEN A SHIPPING DENSITY OF 50 PCF IS CONSIDERED AS AN END POINT FOR THE WEIGHT OF COMMODITIES WHICH COULD BE LOADED SO AS TO VISIBLY FILL THE CARGO BODIES OF LARGE VEHICLE COMBINATIONS. USING THIS SHIPPING DENSITY WITH FREIGHT VEHICLES OF MAXIMUM DIMENSIONS ALLOWED BY THE AASHO SIZE AND WEIGHT POLICY RESULTS IN MAXIMUM GROSS VEHICLE WEIGHTS OF ABOUT 130,000 LB FOR ONE-CARGO VEHICLE COMBINATIONS AND ABOUT 180,000 LB FOR TWO-CARGO VEHICLE COMBINATIONS. /HRB/

Vol 37, pp 21-44, 14 FIG, 3 TAB, 17 REF. 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.

01490401

1958

Highway Research Board Proceedings

Digital/other

Commodities; Density; Freight transportation; Loads; Ton miles; Tonnage; Trailers; Trucks; Weight

Data

Economics; Freight Transportation; Highways; Motor Carriers; Safety and Human Factors; Society

TRIS, TRB

Oct 3 1971 12:00AM

• A COMPARATIVE STUDY OF TWO VEHICLE OPERATING-CHARACTERISTICS INSTRUMENTS
• A PRACTICAL APPLICATION OF THE IMPERFECT DITCH METHOD OF CONSTRUCTION
• A STUDY OF SOIL WAVE PROPOGATION
• ANALYSIS OF HIGHWAY NETWORKS: A LINEAR PROGRAMMING FORMULATION
• APPLICATION OF OPERATIONS RESEARCH TO HIGHWAY PROBLEMS
• CONSOLIDATION OF SOIL UNDER TIME-DEPENDANT LOADING AND VARYING PERMEABILITY
• CORROSION FUNDAMENTALS AND MATERIALS PROPERTIES
• CUTTING AND PENETRATION OF SOILS UNDER VIBRATORY LOADING: A PROGRESS REPORT
• DEEP SILT CONSOLIDATED BY SURCHARGE FILL ON PATAPSCO TUNNEL APPROACH
• DIRECT EVALUATION OF GEOMETRIC HIGHWAY DESIGN
• DRIVER RESPONSE TO RADAR BRAKES
• ECONOMIC ANALYSIS - THE FUNDAMENTAL APPROACH TO DECISIONS IN HIGHWAY PLANNING AND DESIGN
• EFFECT OF STRESS HISTORY AND FREQUENCY OF STRESS APPLICATION ON DEFORMATION OF CLAY SUBGRADES UNDER REPEATED LOADING
• ELECTRONIC CONTROL OF MOTOR VEHICLES ON THE HIGHWAY
• EXPERIMENTAL PRESTRESSED CONCRETE HIGHWAY PROJECT IN PITTSBURGH
• IMPROVING THE DURABILITY OF CONCRETE IN MAINE
• INFLUENCE OF FINE AGGREGATES ON ASPHALTIC CONCRETE PAVING MIXTURES
• LEAN-MIX ROLLED CONCRETE FOR PAVEMENT SLABS
• MEASUREMENT OF DRIVER REACTIONS TO TUNNEL CONDITIONS
• MINNESOTA EXPERIENCE IN COUNTING TRAFFIC ON LOW-VOLUME ROADS
• NATURE AND MAGNITUDE OF SWELL PRESSURE
• PILE TEST LOADS COMPARED WITH BEARING CAPACITY CALCULATED BY FORMULAS
• POLYACIDS AND LIGNIN USED WITH LARGE ORGANIC CATIONS FOR SOIL STABILIZATION
• PORE PRESSURES IN BASE COURSE
• PRETREATMENT OF CONCRETE PAVEMENT FOR TRAFFIC STRIPING
• PROGRESS REPORT OF COMMITTEE ON ECONOMICS OF MOTOR VEHICLE SIZE AND WEIGHT. I: INTRODUCTION
• RADIOGRAPHIC INSPECTION OF WELDED HIGHWAY BRIDGES
• RESEARCH STUDIES IN CONNECTION WITH DESIGN FEATURES OF THE FLORIDA TURNPIKE
• SHEAR STRENGTH OF PRESTRESSED CONCRETE I-BEAMS
• SOME CHARACTERISTICS OF THE MODULUS OF PASSIVE RESISTANCE OF SOIL: A STUDY IN SIMILITUDE
• SOURCE OF THE NON-MIGRATABLE IONIC CHARGES DEVELOPED BY PORTLAND AND HIGH-ALUMINA CEMENTS DURING HYDRATION
• TIME DEFORMATION STUDIES ON TWO EXPANDED SHALE CONCRETES
• TRAFFIC FLOW IN TUNNELS
• TRIAXIAL TESTING OF BITUMINOUS MIXTURES AT HIGH CONFINING PRESSURES
• URBAN TRAFFIC VOLUME PATTERNS IN TENNESSEE
• USE OF ELECTRONIC COMPUTERS IN MAINTENANCE COST ACCOUNTING
• USE OF FOAMED ASPHALT IN SOIL STABILIZATION
• VALUE OF AUTOMOBILE TRANSIT TIME IN HIGHWAY PLANNING