ארכיון חודשי: פברואר 2020

Fecr

1. Vel fecri.
2. Ve leyâlin aşrın.
3. Veş şef’ı vel vetri.
4. Vel leyli izâ yesr(yesri).
5. Hel fî zâlike kasemun li zî hicr(hicrin).
6. E lem tera keyfe feale rabbuke bi âd(âdin).
7. İreme zâtil ımâdi.
8. Elletî lem yuhlak misluhâ fîl bilâd(bilâdi).
9. Ve semûdellezîne câbûs sahra bil vâdi.
10. Ve firavne zîl evtâdi.
11. Ellezîne tagav fîl bilâd(bilâdi).
12. Fe ekserû fîhâl fesâd(fesâde).
13. Fe sabbe aleyhim rabbuke sevta azâb(azâbin).
14. İnne rabbeke le bil mirsâd(mirsâdi).
15. Fe emmâl insânu izâ mâbtelâhu rabbuhu fe ekramehu ve na’amehu fe yekûlu rabbî ekrameni.
16. Ve emmâ izâ mâbtelâhu fe kadera aleyhi rızkahu fe yekûlu rabbî ehâneni.
17. Kellâ bel lâ tukrimûnel yetîm(yetîme).
18. Ve lâ tehâddûne alâ taâmil miskîn(miskîni).
19. Ve te’kulûnet turâse eklen lemmen.
20. Ve tuhıbbûnel mâle hubben cemmen.

21. Kellâ izâ dukketil ardu dekken dekkâ(dekken).
22. Ve câe rabbuke vel meleku saffen saffâ(saffen).
23. Ve cîe yevme izin bi cehenneme yevme izin yetezekkerul insânu ve ennâ lehuz zikrâ.
24. Yekûlu yâ leytenî kaddemtu li hayâtî.
25. Fe yevme izin lâ yuazzibu azâbehû ehadun.
26. Ve lâ yûsiku vesâkahû ehadun.
27. Yâ eyyetuhân nefsul mutmainnetu.
28. İrciî ilâ rabbiki râdıyeten mardıyyeten.
29. Fedhulî fî ibâdî.
30. Vedhulî cennetî.

Mirac Mirage

Amene-rrasûlu bimâ unzile ileyhi min rabbihi velmu/minûn(e)(c) kullun âmene bi(A)llâhi ve melâ-iketihi ve kutubihi ve rusulihi lâ nuferriku beyne ehadin min rusulih(i)(c) ve kâlû semi’nâ ve ata’nâ(s) ġufrâneke rabbenâ ve-ileyke-lmasîr(u) (Bakara-285)

Lâ yükellifu(A)llâhu nefsen illâ vus’ahâ(c) lehâ mâ kesebet ve’aleyhâ me-ktesebet(k) rabbenâ lâ tu-âḣiżnâ in nesînâ ev aḣta/nâ(c) rabbenâ velâ tahmil ‘aleynâ isran kemâ hameltehu ‘ale-lleżîne min kablinâ(c) rabbenâ velâ tuhammilnâ mâ lâ tâkate lenâ bih(i)(s) va’fu ‘annâ vaġfir lenâ verhamnâ(c) ente mevlânâ fensurnâ ‘ale-lkavmi-lkâfirîn(e) (Bakara-286)

Highway Safety

Group 2D–Design And Construction Pavement surface texture, Vehicle handling, Tire road contact forces, Tire side forces, Steering, Computerized simulation, Sideslip, Chi square test, Histograms, Tire slip motion, Lateral force, Camber, Coefficient of friction, Vehicle center of gravi ty, Lane changing, Neutral steer, Turning, Understeer, Oversteer, Vehicle control, Weight transfer, Mathematical models, Mathematical analysis A simple mathematical model is selected to represent the vehi cle, and pavement roughness is introduced in the form of time varying dynamic tire forces. The path of the vehicle is deter mined for a step steer angle input for different vehicle parame ters and pavement roughness. The steer angle and the sideslip angle are determined for selected paths and vehicle parameters. It is concluded that pavement roughness reduces the forces that are available to control the vehicle. HS-013 900 2I. Traffic Control NATIONWIDE PERSONAL TRANSPORTATION STUDY; REPORT 8. HOME-TO-WORK TRIPS AND TRAVEL Federal Hwy. Administration, Washington, D. C. P. V. Svercl, R. H. Asin 1973 104p Rept. No. 8 Corporate author Commuting patterns, Trip length, Travel time, Travel modes, Vehicle mileage, Automobile occupancy, Trip purpose, Day of week, Time of day, Driver residence, Age factors, Residential location, Public transportation usage, Automobile usage, In come, Occupation, Population density, Automobile ownership, Parking, Questionnaires Most workers live in places with the same size population as their place of employment, and 53% live five miles or less from their jobs and arrive in 15 minutes or less. Almost 83% of com muting is done by automobile; almost 80% in single-occupant cars; and almost 90% from Monday through Friday. The au tomobile is the commuter's predominant travel mode. Automo bile users usually commute farther and arrive in less time than public transportation users. The average home-to-work trip is 9.9 miles by all travel modes and 9.4 miles by automobile. Half of all workers have no public transportation available. Commut ing accounts for almost one-third of all automobile trips and vehicle mileage. Two-thirds of commuting trips are made between 6:00 and 9:00 a.m., and 3:00 and 6:00 p.m. Approxi mately 52% of commuting automobile trips are five miles or less and almost three-fourths are 10 miles or less. HS-013 782 DRIVER REACTION INFLUENCE ON THE STABILITY OF ROAD TRAFFIC FLOW International Conference on Vehicle Mechanics (2nd) Proceedings, Amsterdam, 1973 p75-88 Rensselaer Polytechnic Inst., Troy, N. Y. P. W. Berry, D. McBrinn 1973 3 refs In HS-013 800 Computerized simulation, Traffic flow, Simulation models, Car following, Linear systems, Nonlinear systems, Driver reaction time, Acceleration A digital computer simulation is used to investigate the dynam ics of a train of unconnected vehicles. The study is particularly aimed at an understanding of the characteristics of automobile traffic flow on a major highway. The simulation technique al lows full flexibility in investigating a wide range of models, both linear and nonlinear. In particular, the effects of driver delay time, nonlinearities in the driver response to inputs, and limitations on achievable accelerations are investigated. The results obtained demonstrate that large differences, both qualitative and quantitative, exist between the linear models and the more realistic nonlinear models. HS-013 804 3. HUMAN FACTORS MANPOWER DEVELOPMENT IN TRAFFIC SAFETY (GUIDELINES FOR ESTABLISHING INTERNSHIP PROGRAMS) San Diego County Engineer Dept. Calif. W. E. Marsden, Jr., R. C. Sanders 1973 27p Corporate author Manpower utilization, Highway safety programs, Safety educa tion, Guidelines, Management, Program evaluation, Financing, Curricula Although Federal and State highway safety work programs call for manpower development in traffic safety, there is currently no systematic method for determining manpower resource needs and the means for meeting those needs. Traditionally highway safety manpower needs have been filled from three principal sources: law enforcement, traffic engineering, and de partments of motor vehicles. Persons assigned highway safety tasks have had to learn the job as they perform it. This report provides general guidelines for highway safety internship pro grams which will supply the future manpower needs of highway safety with a trained, educated cadre of safety professionals. Suggested course offerings for traffic safety majors at both the Bachelors and Masters levels are included. HS-013 783 3A. Alcohol MOTOR CARRIER ACCIDENT INVESTIGATION. WILLIAM VOLKER AND COMPANY AND KERRVILLE BUS COMPANY. ACCIDENT–MARCH 7, 1973–BAKERSFIELD, TEXAS. NINE KILLED 17P Rept. No. 73-1 Corporate author Accident case reports, Accident investigation, Truck accidents, Bus accidents, Driver intoxication, Accident caused fires, Cen terline crossover collisions, Tractor semitrailers, Bridge parapets, Vehicle fixed object collisions, Accident location, Jackknifing, Driver characteristics, Vehicle characteristics, Ac cident causes, Blood alcohol levels, Bakersfield (Texas) At 9:10 p.m. a westbound tractor semitrailer collided with a parapet of the Tunis Creek Bridge and traveled along the bridge striking the curb and railing. The truck then jackknifed and struck a bus traveling in the opposite lane of traffic. Both vehi cles were engulfed in flames and totally destroyed. Nine fatali ties, 20 injuries, and —90,000 property damage resulted. The probable cause of the accident was the disorientation of the in toxicated truck driver, who had a blood alcohol level of .185%. The co-driver of the truck was also intoxicated with a blood alcohol level hs13821

Group-5V Vehicle System

Group 5V—Wheel Systems changes in tire tread compound, ply rubber, and tire cord on the tire energy losses can be predicted. This enables the design of a tire with the properties to meet desired service characteristics. HS-013 742 RUBBER STOCKS FOR IMPROVED PERFORMANCE OF POLYESTER CORD TIRES Rubber Chemistry and Technology v46 n.5 p.442-8 (Jun 1973) Y. Iyengar, D. F. Ryder 1973 7refs See serial citation Polyester tires, Tire cords, Tire materials, Tire casings, Rubber compounds, Tire tests, Durability tests, Tire treads, Adhesion, Fatigue tests, Amines, Temperature endurance tests, Tire infla tion pressure, Laboratory tests Carcass stocks were developed with acceptable properties and good adhesion to polyester tire cords after severe heat aging in laboratory tests. These stocks contained vulcanization accelera tors that did not liberate amines. In a variety of wheel tests designed to assess durability under extreme conditions, two ply tires with cords of Dacron polyester containing amine-free tread and carcass stocks showed highly improved durability (180-440%) compared to control tires made with stocks contain ing amines. In low pressure endurance test, tire durability in creased with decreasing amine content of the rubber stocks used. In a special high temperature tire fatigue test to produce break-about-bead failures, tires combining an experimental Dacron polyester with low carboxyl content and in amine-free stocks ran 350% longer than tires of standard T-68 Dacron in amine-containing stocks. These tests clearly illustrated the addi tive benefits of combining an improved polyester with stocks having reduced amine content. HS-013 743 APPLICATION OF HOLOGRAPHY TO THE STUDY OF TIRE WIBRATIONS Tire Science and Technology v I n2 p255-66 (Aug 1973) G. R. Potts 1973 7 refs Presented at a meeting of the Society for Experimental Stress Analysis, Cleveland, 23-26 May 1972. See serial citation Holography, Tire vibration, Vibration analysis, Resonant frequency, Bias tires, Bias belted tires, Radial tires, Tire characteristics, Tire riding characteristics Tire vibrations were studied by applying an oscillatory load to bias, belted bias, and radial ply tires in the radial, lateral, and circumferential directions. Resonant frequencies were noted in each type of tire and the corresponding mode shapes observed with both real time and time average holography. The im portance of tire vibrations in affecting vehicle ride is noted and the variables affecting these vibrations are discussed. HS-013 763 SCALE MODELING OF EQUILIBRIUM TIRE TEMPERATURE Tire Science and Technology v1 n} p267-89 (Aug 1973) D. J. Schuring 1973 14refs Contract CC-166 Prepared in cooperation with Goodyear Tire and Rubber Co. See serial citation Tire temperature tests, Scale models, Tire performance, Heavy duty, tires, Off the road vehicles, Model tests, Stress (mechanics), Tire pavement interface, Coefficient of friction, Heat transfer, Tire loads, Tire inflation pressure, Mathematical analysis, Tire cords Examination of heat generation in an earthmover tire traversing rigid terrain indicates that most heat originates in the tire bulk; heat generated in the contact area is small and can be neglected. Modeling of equilibrium bulk heat requires using the same com pound for model and prototype, keeping both tires geometri cally similar, and running them at constant speed to reach equilibrium temperature. Then, three model rules apply; one al lows for geometrical distortion of cord arrangement in static loading, and the others impose similar mechanisms of heat generation and dissipation on the model and prototype. The ef fect of cord distortion on heat generation is unknown and must be assessed experimentally. Preliminary tests indicate that the model rules of heat generation are basically correct. Problems associated with stress distortion, heat convection, and inflation pressure buildup remain. Self-modeling tests on the same tire, and scale model tests with geometrically similar tires are recom mended. HS-013 764 MECHANICS OF THE PNEUMATIC TIRE. PT. 1. THE TIRE UNDER INFLATION ALONE Tire Science and Technology v1 n} p290-345 (Aug 1973) E. Robecchi, L. Amici 1973 21 refs See serial citation Pneumatic tires, Tire mechanics, Tire inflation pressure, Stress (mechanics), Tire forces, Stress analysis, Tire shape, Tire profile measurement, Bias tires, Tire cords, Tire ply number, Strain (mechanics), Radial tires, Rayon tires, Nylon tires, Tire materials, Tire loads, Equations of equilibrium, Mathematical models The theoretical basis for inflated tire calculations is explained, and models of the tire are developed that exhibit a high degree of accuracy. After establishing the fundamental equations com mon to the various models, the simplest case, a net of inexten sible cords, is treated. The effects of cord extension and angu lar distributions different from the simple cosine law are then considered. For each model it is convenient to proceed to a par ticular form of the fundamental formula in order to simplify the calculations and to clarify the influence of the various parame ters. The models are of value for conventional tires; in the case of radial tires it is only possible to study the part of the carcass

January 29,1974

columns, Sensors, Vehicle kinematics, Rollover tests, Drop tests, Crush tests, Energy absorption Major structural effort was directed toward development of a crashworthy design suitable for full size automobiles to provide protection during front, side, and rollover collisions. More limited effort was directed towards development of modified front structures for luxury, compact, and subcompact automo biles. Test results from these modified vehicles were compared to similar data for conventional automobiles. Generally, the structural modifications resulted in considerable reduction in passenger compartment intrusions while maximum decelera tions were nominally unchanged. Information on the crash per formance of steering column assemblies, crash detectors, and restraint systems was obtained in piggyback manner within the overall test objectives of the project. Analytical methods for analyzing frame structures undergoing dynamic impact with fixed objects were developed for both two and three-dimen sional frame structures. Reasonable correlation was obtained between analytical and experimental results. HS-800 887 MODEL 0102 FILAT PLATE ANTENNA FOR USE IN AUTOMOBILE RADAR ANTICIPATORY CRASH SENSORS. FINAL REPORT Cutler-Hammer, Deer Park, N. Y. K. V. Toth, R. M. Rudish 1973 29p Rept. No. DOT-TSC-NHTSA-73-8 Contract DOT-TSC-437 Report for Jun-Sep 1972. NTIS Antennas, Radar, Polyurethane foams, Connectors, Sensors, Costs, Manufacturing A flat plate antenna based on the use of etched circuit techniques has been developed. The antenna is a minimal volume planar array structure, ideally suited for low cost production. The radiating elements and feed circuitry are etched on the same substrate. The antenna is 2-5/8 x 4-5/8 x 15/16 inches (exclusive of output connector). Although its ac tive region is only a fraction of this space, a breadboard version of this antenna achieves more than 13-dB gain over the required one percent region of X-band, with radiation patterns having excellent suppression of side lobes. A production design is postulated which is suitable for automated production processes. The resulting antenna is a sandwich of one printed circuit between two layers of foam; this sandwich is encased in a molded, metalized lexan housing, and is faced with a lexan radome. HS-800 968 FABRICATION TECHNIQUES AND PRINCIPLES FOR FLAT PLATE ANTENNAS. FINAL REPORT 31P2REFS Rept. No. DOT-TSC-NHTSA-73-7 Contract DOT-TSC-390 Report for May-Aug 1972. NTIS Antennas, Production control, Manufacturing, Frequencies, Die casting, Molding, Costs, Sensors, Radar An analysis of the reliability, electrical integrity, repeatability, and cost is made for a production run of both one and ten mil lion flat plate antennas per year. The fabrication techniques selected to produce the antennas include die casting, pierce and Door Systems—Group 5E blanking, injection molding, and cold heading. The flat plate an tenna would be fabricated in six elements. An automatic as sembly center would be used to achieve the high volume production runs. One such unit operating at maximum efficien cy will produce one million units per year at a cost of –0.41 per unit. Two additional stations will achieve production runs of over 10 million per year at a cost of –0.30 per unit, excluding overhead. The flat plate antennas can be scaled to a frequency of 17.5 gigahertz with no significant effect of cost or per formance. Scaling to a frequency of 21 gigahertz is possible at a higher cost per unit. HS-800 969 TITLE 2. AUTOMOBILE CONSUMER INFORMATION STUDY. MOTOR VEHICLE INFORMATION AND COST SAVINGS ACT. PUBLIC LAW 92-513, OCTOBER 20, 1972. PLANNING TASK FORCE REPORT 38P Includes Public Law 92-513. Corporate author Consumer information regulations, Public information pro grams, Consumer protection, Consumer education, Insurance industry, Insurance claims, Insurance rates, Automobile com parisons, Repair industry, Accident statistics, Crashworthiness, Benefit cost analysis, Mathematical models An economic impact study must be performed to focus on the economic, sociological, psychological, environmental, and political impacts of consumer information on affected societal groups. A consumer information dissemination study must also be performed to concentrate on information dissemination techniques, media considerations, and trade-off analyses of methods for direct-to-consumer and point-of-sale information. A study report of activities underway and completed should be prepared and submitted to the Congress in October 1973. This report would highlight the status of the Automobile Consumer Information Study and would provide a target schedule for publication of consumer information packages. Both new car and used car consumer information must be provided to the public. Potential data sources on vehicle damage susceptibility, crashworthiness, and repairability include vehicle test and design and repair and insurance industry data, mathematical modeling, car owners and drivers, and accident records. HS-800 993 5E. Door Systems DOOR CRASHWORTHINESS CRITERLA. FINAL REPORT Michigan Univ., Ann Arbor. Hwy. Safety Res. Inst. For primary bibliographic entry see Fld. 5E. HS-800 924 DOOR CRASHWORTHINESS CRITERIA. FINAL REPORT Michigan Univ., Ann Arbor. Hwy. Safety Res. Inst. R. L. Stalnaker, V. L. Roberts, J. H. McElhaney 1973 95p

Group5dDesing

Group 5D–Design DESIGN SAFETY PRINCIPLES FOR RECREATIONAL VEHICLES BASED ON IN-DEPTH ACCIDENT INVESTIGATION University of Southern California, Los Angeles For primary bibliographic entry see Fld. 1C. HS-013 677 DETERMINING SAFETY CHARACTERISTICS OF RECREATIONAL VEHICLES Ultrasystems, Inc., Newport Beach, Calif. For primary bibliographic entry see Fld. 5T. HS-013 679 WHEN DOES ANOVERLOAD PROBLEM BECOME A SAFETY -RELATED DEFECT WITHIN THE MEANING OF THE NATIONAL TRAFFIC AND MOTOR VEHICLE SAFETY ACT OF 1966 Recreational Vehicle Inst., Inc., Washington, D.C. For primary bibliographic entry see Fld. 5. HS-013 684 THE EVOLUTION OF THE MOTOR HOME CHASSIS Chrysler Corp., Detroit, Mich. For primary bibliographic entry see Fld. 5T. HS-013 685 ADVANCED DEVELOPMENTS IN RV SAFETY MOTOR HOMES Winnebago Industries, Inc., Forest City, Iowa C. M. Schaninger 1973 13p Rept. No. Paper-73047 In HS-013 673, International Congress on Automotive Safety (2nd) Proceedings. Vol. 2, Recreational Vehicle Safety, Washington, D.C., 1973 Recreational vehicle safety, Safety design, Instrument panel design, Exits, Pushout emergency windows, Seat belt anchorages, Preventive maintenance, Owner manuals, Win nebago Industries, Inc., Motor homes As a major manufacturer of recreational vehicles, Winnebago is engaged in advanced research and engineering to assure the safety and crashworthiness of motor homes. Safety develop ments in instrument panel design, emergency escape systems, and seat belt systems for motor homes are described. Another aspect of motor home safety involves operator education. Win nebago has developed comprehensive owner manuals for each of the four major lines of motor homes to educate the operator about the proper operation of the motor home and the need for a preventive maintenance program to keep the vehicle in proper condition. HS-013 688 A REVIEW OF THE G.M.C. MOTOR HOME SAFETY PROGRAM General Motors Corp., Detroit, Mich. K. Stubenvol 1973 17p Rept. No. Paper-73048 In HS-013 673, International Congress on Automotive Safety (2nd) Proceedings. Vol. 2, Recreational Vehicle Safety, Washington, D.C., 1973 Vehicle design, Recreational vehicle safety, General Motors Corp., Safety design, Fatigue tests, Performance tests, Road tests, Durability tests, Motor homes Safety considerations used in the design of the General Motor Corporation's (GMC) motor home are discussed. The basic design of the GMC motor home and some of the vehicle and component tests to which motor home is subjected are briefly described. HS-013 689 STABILAIRE TRUCK DRIVE AXLE SUSPENSION: SERIES 400 Western Unit Corp. For primary bibliographic entry see Fld. 5T. HS-013693 TRUCK VIBRATION DIAGNOSTICS USING A NEW ELECTRONICTECHNIQUE Northrop Corp., Los Angeles, Calif. For primary bibliographic entry see Flo. 5T. HS-013695 SOME FURTHER TESTS ON A COMPUTER PROGRAM TO SIMULATE INTERNAL COMBUSTION ENGINES Manchester Univ., Lancs. (England) R. S. Benson, P. C. Baruah 1973 16p 8refs Rept. No. SAE-73.0667 Presented at Combined Commercial Vehicle Engineering and Operations and Powerplant Meetings, Chicago, 18–22 Jun 1973. SAE Engine performance, Computerized simulation, Engine tests, Diesel engines, Turbochargers, Calibration, Intake systems, Exhaust systems, Engine operation conditions, Air flow rates, Heat transfer, Temperature, Performance characteristics The results are presented of tests on a turbocharged four stroke diesel engine in which the test results are compared with predic tions using a generalized computer program. An examination is made of the influence of the cylinder heat transfer coefficient, the cylinder wall temperature, the exhaust pipe wall tempera ture, and the air valve flow areas on the engine and tur bocharger performance predictions in order to establish the limits of accuracy required for these data. The effect of includ ing the intake system in the calculation is also examined. Results are presented comparing the actual performance of the turbocharger with the predicted performance using steady flow data. From this investigation, it is concluded that the engine simulation programs give good predictions of the engine per formance and matching data over a wide spread and power range, provided the input data are representative of what one might expect for the engine. HS-013 705 BASIC RESEARCH IN CRASHWORTHINESS 2. SUMMARY FINAL REPORT Calspan Corp., Buffalo, N. Y. P. M. Miller, ed. 1973 162p 36refs Rept. No. YB-2987-V-21 Contract FH-11–7622 Report for Jul 1970-May 1973. NTIS Crashworthiness, Vehicle design, Structural design, Automo bile modification, Vehicle performance, Dynamic structural analysis, Structural deformation analysis, Side impact tests, Vehicle vehicle impact tests, Low speed impact tests, Head on impact tests, Restraint system tests, Computerized simulation, Crash response forecasting, Luxury automobiles, Occupant protection, Compact automobiles, Data reduction, Steering

Safety Move

Information system design, Computerized records manage ment, Coding systems, Data processing, Driver education, Traffic records, Manuals, State planning, Driver education laws The Educational Services Data Subsystem of the State Traffic Records System is designed to support the operational require ments for management of primary driver education services; support the State's requirements for exercising control over the quality of driver education available at the commercial level through licensing procedures, training program standards, and regulatory activities for the commercial schools; and support State operation of remedial education programs designed for problem drivers. The subsystem consists of an educational ser– vices directory file, an educational institutions inventory file, a commercial companies inventory file, and a state remedial ser– vices inventory file. The data contents of the four subsystem files are summarized and detailed recommended coding formats and codes for

Consumer information regulations, Public information pro grams, Consumer protection, Consumer education, Insurance industry, Insurance claims, Insurance rates, Automobile com parisons, Repair industry, Accident statistics, Crashworthiness, Benefit cost analysis, Mathematical models An economic impact study must be performed to focus on the economic, sociological, psychological, environmental, and political impacts of consumer information on affected societal groups. A consumer information dissemination study must also be performed to concentrate on information dissemination techniques, media considerations, and trade-off analyses of methods for direct-to-consumer and point-of-sale information. A study report of activities underway and completed should be prepared and submitted to the Congress in October 1973. This report would highlight the status of the Automobile Consumer Information Study and would provide a target schedule for publication of consumer information packages. Both new car and used car consumer information must be provided to the public. Potential data sources on vehicle damage susceptibility, crashworthiness, and repairability include vehicle test and design and repair and insurance industry data, mathematical modeling, car owners and drivers, and

VEHICLE SAFETY WHEN DOES ANOVERLOAD PROBLEM BECOME A SAFETY-RELATED DEFECT WITHIN THE MEANING OF THE NATIONAL TRAFFIC AND MOTOR VEHICLE SAFETY ACT OF 1966 Recreational Vehicle Inst., Inc., Washington, D.C. D. J. Humphreys 1973 17p Rept. No. Paper-73038 In HS-013 673, International Congress on Automotive Safety (2nd) Proceedings. Vol. 2, Recreational Vehicle Safety, Washington, D.C., 1973 National Traffic and Motor Vehicle Safety Act of 1966, Recrea tional vehicles, Defects, Defective vehicles, National Hwy. Traf. Safety Administration, Load bearing capacity, Court deci sions, Failures, Recall campaigns, Legal factors, Vehicle weight limits, Rule making An investigation of the phrase defect which relates to motor vehicle safety or, as it is more commonly paraphrased, safety related defect as it is used in the National Traffic and Motor Vehicle Safety Act of 1966 as amended and an effort to assess its relevance and consequence in relation to overload situations involving recreational vehicles is presented. In order to deter mine what a safety-related defect is, the language of the Na tional Traffic and Motor Vehicle Safety Act of 1966; the legisla tive history of safety-related defects; National Highway Traffic Safety Administration procedures, rule making, and interpreta tive opinions to date; a judicial review of safety-related defects; and new legislative proposals bearing on the problem are reviewed. The vehicle overload problem is defined in terms of gross axle weight rating and gross vehicle weight rating. An ap proach to making a determination of safety-related defects is suggested. HS-013 684