NGSIM使用手册（1）

【实例简介】
美国NGSIM系统的使用手册，方便读者高效的利用NGSIM进行数据下载，完成交通领域的研究
Technical Report Documentation Page 1. Report No 2. Government Accession no 3. Recipients Catalog No FHWA-HOP-06-012 4. Title and subtitle 5. Report Date Next Generation Simulation(NGSIM) Data Format Plan ly2004 6. Performing Organization Code 7. Author(s 8. Performing Organization report no Vijay Kovvali, richard margiotta, Robert franc, vassili Alexiadis 9. Performing Organization Name and Address 10. Work Unit No CAMBRIDGE SYSTEMATIC INC 150 CAMBRIDGE PARK DRIVE SUITE 4000 11. Contract or grant no CAMBRIDGE MA 02140 DTFH61-02-C-00036 12. Sponsoring Agency Name and Address 13. Type of Report and Period Covered Department of transportation Final report Federal Highway Administration July 2003-july 2004 Office of Acquisition Management 14. Sponsoring Agency Code 400 Seventh Street SW, RM 4410 Washington, DC 20590 15. Supplementary notes FHWA COTR: John Halkias, Office of Operations, and James Colyar, Office of Operations r&d 16. Abstract The Next Generation Simulation Program(NGSIM) Data Format Plan was developed to define the structure, documentation, and transfer requirements for data that will be collected for estimation calibration, and validation of core behavioral algorithms. The development of the data Format Plan is based on existing formats that are relevant to ngsim and augmented to fill in gaps. to this end, a review of existing data formats was undertaken and their relevance to NGSiM was assessed. The review included data standards developed for intelligent transportation systems(ITS), data formats developed specifically for traffic simulation models, and data formats developed for broader transportation applications. The specified data formats were developed with the objective of promoting efficient research by maintaining onsistency between data collection and research, and providing consistent storage and transmittal protocols. On the other hand, this plan intentionally avoids over specification of data formats, so as to minimize unnecessary limitations to research. This document specifies the conceptual data model by means of Unified Modeling Language UMl class diagrams; the data dictionary in the data standard prescribed b P1489-1999 format developed by the Institute of Electrical and Electronics Engineers(IEEE); the data exchange structure for data transfer from user to user or from the database/repository to users; and the NGSIM metadata 17. Key words 1 8. Distribution Statement Next generation simulation, NGSIM, traffic No restrictions. This document is available to the simulation, high-level plan, traffic data collection, public through the National Technical Information vehicle trajectory data Service, Springfield, VA22161 19. Security Classif. (of this report) 20. Security Classif. (of this page) 21. No of Pages22. Price Unclassified Unclassified Form dot e1700.7(8-72) Reproduction of completed pages authorized TABLE OF CONTENTS EXECUTIVE SUMMARY 1.0 INTRODUCTION 1.1High- Level plan context…… 垂垂垂垂·着垂垂垂垂非垂·非垂垂看垂音非非;·垂垂音看垂看垂 1.2 Background 1.3 Data Collection Types…… 134458 1. 4 Data Conversion 1.5 Data Formats ·····.···············.··.···.·;···..·.··..·.··· 2.0 NGSIM DATA REQUIREMENTS 22 Microsimulation Software Data format,…………17 2.1 NGSIM Data …19 2.3 Rcquirements for NgsiM data Collection..................19 3.0 RECOMMENDED NGSIM DATA FORMATS..m. 23 3.1 NGSIM Data model 23 3.2 NGSIM Data Dictionary ……………24 3.3 NGSIM Metadata.............................25 3.4 NGSIM Data Exchange Format 27 3.5 File and Directory Naming Convention ……29 3.6 Summary 30 REFERENCES 31 APPENDIX A-REVIEW OF EXISTING TRANSPORTATION DATA FORMATS 3 APPENDIX B-ACCURACY REQUIREMENTS FOR NGSIM DATA COLLECTION ,45 APPENDIX C-DATA MODEL∴….,,53 APPENdIXD-DATA DICTIONARY. APPENDIX E-METADATA. ...........................................................................................99 APPENdIX F-SYSTEM-STATE DATA 看香音看音香 n117 List of Figures Figure 1 Diagram. NGSIM task interdependencies 4 Figure2. Diagran. Data format classification relevant to ngsim1……… Figure 3. Diagram. Top level data model of general traffic simulation55 Figure4. Diagram. Influencing factors database packages……………… 56 Figure 5. Diagram. Behavioral models packages 57 Figure6. Diagran. Facility type generalization…………18 Figure 7. Diagram. Traffic management systems generalization......59 Figure 8. Diagram. Transit management systems generalization Figure9. Diagran. nvironment generalization.………………………0 Figure 10. Diagram NTCIP Controller class diagram 61 Figure 11 Diagram Actuated traffic signal controller generalization 2 Figure12 Diagram. Generalized microsimulation data model………………63 Figure 13 Diagram Data concept components and constructs(IEEE Std 1489-1999)66 List of tables Table 1. Example validation data by algorithm category Table 2. Summary of NGSiM categorizations for data formats Table 3. Accuracy requirements for vehicle trajectory data. ..45 Table 4. Accuracy requirements for instrumented vehicle data.........46 Table 5. Accuracy requirements for wide-area detector data......... 47 Table 6. Accuracy requirements for nctwork-rclated data 48 Table 7. Accuracy requirements for representative transportation management systems data 52 Table 8. Terminology for UML modeler 54 Table 9. Data dictionary for NgSim .67 Table 10 processing documentation metadata for ngsimwwwwwm116 Table1l. Requisite vehicle trajectory data…………………………117 Table 12. requisite wide-area detector data requirements ……118 EXECUTIVE SUMMARY The Next Generation Simulation Program(NGsim) Data Format plan was developed to define the structure, documentation, and transfer requirements for data that will be col- lected for estimation, calibration, and validation of core behavioral algorithms. The development of the data format plan is based on existing formats that are relevant to NGSIM and augmented to fill in gaps. To this end, a review of existing data formats was undertaken and their relevance to ngsim was assessed. The review included data stan dards developed for intelligent transportation systems (ITS), data formats developed spe- cifically for traffic simulation models and data formats developed for broader transporta- tion applications. The specified data formats were developed with the objective of pro- moting efficient research by maintaining consistency between data collection and research, and providing consistent storage and transmittal protocols. On the other hand this plan intentionally avoids overspecification of data formats, so as to minimize unnec essary limitations to research Four data format components were specified in this document, including: 1)data model, 2)data dictionary, 3 )metadata, and 4) data exchange format NGSIM Data Model- The conceptual data model for NGSIM data formats is pre- sented by means of Unified Modeling Language() class diagrams. Used in con- junction with the data dictionary, the data model allows for construction of a formal database/repository for NGSIM validation data NGSIM Data Dictionary This provides definition of individual data elements required by NGsim. It follows the data standard prescribed by P1489-1999 format developed by the Institutc of Elcctrical and Electronics Engineers(ieee) NGSIM Data Exchange Format- The data cxchange structure dcfincs how data should be transferred from user to user or from the database /repository to users. This document specifies the framework for developing data exchange formats by providing the data model and the data dictionary; it also provides clear guidance on the format standards with which the data exchange format should conform Currently it does not provide specific schema for the data exchange formats NGSIM Metadata- This includes both traditional metadata(definitions, specifications and valid value lists for data elements and general information about the dataset and its availability); and processing metadata(what has happened to the data from data col- lection to data archival). Administrative metadata formats were adapted from Content Standard for Digital Geospatial Metadata(FGDC-STD-001-1998), developed by the Federal Geographic Data Committee(FGDC). Recommendations for NGSiM processing metadata are based on the guidance provided in ASTM E2259-03, devel- oped by the American Society for Testing and Materials(ASTm) 1.0 INTRODUCTION The objectives of the NGsim program include the following Development of a core set of open behavioral algorithms in support of traffic simula tion with a primary focus on microscopic modeling Collection of extensive data that will be used for estimation calibration and validation of the core behavioral algorithms; and storing the data in a repository that can be uni- versally accessed The High-Level Plan for DatasetsTask E3)identified different kinds of traffic data col- lection methods and technologies and recommended three kinds of data collection efforts for ngsim, including vehicle trajectory data wide area detector data and instrumented vehicle data This report Task F)presents the documentation, format structure, and transfer require ments for the ngsim data formats for these data collection efforts identified in task e3 This report is organized as follows Executive Summary -Provides an executive summary of this document Section1.0-Provides an overview and introduction to this report, including the con- text of the data format plan within NGsIM, information on NGsim data collection and data types, information on data conversion, general information on data formats, and a summary of available transportation data formats and their relevance for ngsim Section 2.0-Presents definitions and categorization for different data types, and pro- vides ngsim data requirements Section 3.0-Presents data format recommendations for the NGsim program, including a data model, data elements for the data dictionary, metadata to describe the data collection effort and data exchange formats References-Presents references used in developing this data format plan Appendix a-Presents a review of existing transportation data formats Appendix B-Presents accuracy requirements for NGSiM data collection Appendix C- Presents a UML representation of the ngsim data model Appendix D-Presents a high-level NGSIM data dictionary Appendix E- Presents metadata categories, dictionary, and recommended metadata formats for ngsim 1.1 HIGH-LEVEL PLAN CONTEXT Interdependencies among NGSIM tasks are shown in figure 1. The High-Level Plan for Datasets(Task E. 3) presents an assessment of existing datasets of potential use for NGSIM, and makes recommendations on the focus for nGsim data collection methodologies. This report on the data Format Plan task f) provides recommendations on the data exchange format(s) for NGSIM data collection efforts. The data formats are also influenced by the High-Level Verification and Validation Plan(task e 2) Task E 1-1 Core algorithm Assessment Task e,3 Task e.1-2 Task e2 High-Level Core Algorithm High-Level Verification lan for Datasets Plan andⅤ alidation plan Task e Data format plan Figure 1 Diagram. NGSIM task interdependencies. 1.2 BACKGROUND The NGSiM field data collection effort pursues data required for developing, estimating, calibrating and validating traffic behavioral algorithms. Tactical route execution, opera- tional driving, and en-route strategic traveler behaviors were identified as the focus of the NGSIM core behavioral algorithm research in the identification and prioritization of core Algorithms Task D)report. The High-Level Verification and Validation Plan(task e2) provides an example of the data collection datasets for each algorithm category as shown in table 1. the table illustrates the extent over which data must be collected for each level of algorithm. For example, for operational driving algorithms, a single stretch of roadway on a freeway will likely be sufficient, while, for development of tactical driving algo- rithms, the data collection effort should be expanded to include the freeway section and multiple entry and exit ramps that feed the freeway. The data formats developed in this plan address the data, both static and dynamic, that are pertinent to the data collection efforts necessary for developing and validating all three categories of driver behavioral algorithms 4 【实例截图】
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