U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
202-366-4000
Federal Highway Administration Research and Technology
Coordinating, Developing, and Delivering Highway Transportation Innovations
This report is an archived publication and may contain dated technical, contact, and link information |
|
Publication Number: FHWA-HRT-08-019
Date: November 2007 |
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Development of a Driver Vehicle Module (DVM) for the Interactive Highway Safety Design Model (IHSDM)PDF Version (839 KB)
PDF files can be viewed with the Acrobat® Reader® FOREWORDThe Driver Vehicle Module (DVM) is a software tool that allows traffic engineers and highway designers to evaluate how a driver would operate a vehicle within the context of a specific roadway design and to identify whether conditions exist within that design that could result in loss of vehicle control. It was developed as a candidate evaluation module for the Interactive Highway Safety Design Model (IHSDM). The DVM couples a vehicle dynamics model with a computational model of driver behavior. This model of driver behavior aims to simulate the driver's perceptual, cognitive, and control processes to generate steering, braking, and throttle vehicle inputs. It was primarily developed based on driver performance data collected during on-road instrumented vehicle driving sessions. The development of this tool is part of an ongoing effort to increase the ability of traffic engineers and highway designers to provide a safer driving environment for the public. Michael Trentacoste Director, Office of Safety Research & Development Notice This document is disseminated under the sponsorship of the
U.S. Department of Transportation in the interest of information exchange. The
U.S. Government assumes no liability for the use of the information contained in this document. The
U.S. Government does not endorse products or manufacturers. Trademarks or manufacturers' names appear in this report only because they are considered essential to the objective of the document. Quality Assurance Statement The Federal Highway Administration (FHWA) provides high-quality information to serve Government, industry, and the public in a manner that promotes public understanding. Standards and policies are used to ensure and maximize the quality, objectivity, utility, and integrity of its information. FHWA periodically reviews quality issues and adjusts its programs and processes to ensure continuous quality improvement.
Metric Conversion ChartTable of ContentsPurpose and Organization of this Report SECTION 2. DESCRIPTION AND DEVELOPMENT OF THE DVM SECTION 3. SPECIFICATION OF THE DVM Halt Simulation upon Vehicle Rollover Definition of Off-road Condition Treatment of Curves that are Close Together Specification for Modifying the Developmental DVM Additions to the Output Data File DVM parameters that are Selectable Options Selectable by the User Options Selectable by the System Administrator SECTION 4. VERIFICATION, CALIBRATION, AND VALIDATION OF THE DVM Test Software Implementation for the Heavy Vehicle. Calibration/Validation of the Passenger Vehicle Calibration/Validation Methods Parameters for the Passenger Car Driver Calibration/Validation of the Heavy Vehicle Calibration/Validation Methods Recommended Values for Driver Parameters Validation of Vehicle Dynamics Model for Heavy Vehicle SECTION 5. SUMMARY AND CONCLUSIONS Key DVM Application Constraints Cruise Control and Compound Curves Driver Behavior on Short Tangents Horizontal Sight-Distance Limitations More Flexible Model for Curve Cutting Effects of Driver Eye Height and Grade Differences on Curvature Estimation Additional User Interface Enhancements Enhance the DVM Output Information so that it Better Conforms to End-user needs Develop New Measures of Effectiveness (MOEs) Based on Degree of Speed Change and Available SD Add the ability to compare time histories from multiple model runs on the same graph Recommendations for Using the DVM Future R&D Recommendations for the DVM APPENDIX A - DRIVER/VEHICLE CONFIGURATION PARAMETERS List of FiguresFigure 1. Information flow in the Driver Vehicle Model Figure 2. Flow diagram of the computation of perceptual estimates Figure 3. Diagram of the assumed path through a horizontal curve Figure 4. Pseudo-code for calculating path decision Figure 5. Flow diagram of an approximation to the path-regulation task Figure 6. Simplified flow diagram of the speed decision logic Figure 7. Pseudo-code for calculating speed control Figure 8. Effects of posted speed on predicted speed profile Figure 9. Speed profile for approach, negotiation, and exit of simple curve Figure 10. Speed profile for closely-spaced reverse curve Figure 11. Effect of grade changes on model predictions: Pedal deflection Figure 12. Effect of grade changes on model predictions: speed Figure 13. Effect of lane-keeping assumption on predicted lane deviation Figure 14. X/Y plot of test route Figure 16. Mean first and last speed profiles Figure 18. Mean speed profile for four drivers Figure 19. Mean +/- standard deviation of driver means Figure 20. Predicted speed profile when reducing the lateral acceleration factor to 20 List of TablesTable 1. Major roadway model elements used by the roadway geometrics component Table 2. Standard driver configurations Table 3. Array of posted speeds Table 4. Properties of the simulated reverse curve Table 5. Simulated grade profile Table 6. Results of validation testing for the tests of critical assumption Table 7. Results of validation testing for the tests of real-world predictive abilities Table 8. Parameter values for two driver types Table 9. Parameters of curves selected for estimating statistics of the lateral acceleration factor Table 10. Replications of on-road data used for model analysis Table 11. Summary of validation results for the heavy vehicle Table 12. Parameters related to driver preference Table 13. Initial list of DVM output improvements Table 14. Sample presentation of alert levels Table 15. Specifications for providing output comparisons List of Abbreviations and Symbols
|