00769510

Component

https://doi.org/10.3141/1660-07

http://scholar.google.com...lock&publication_year=1999

The architecture and application of an updated methodology based on the Global Positioning System (GPS) for conducting travel time studies are described. The methodology is called Travel Time with GPS (TTG). TTG uses a general data model that includes a spatial model, a geographic relational database, and a procedure for linearly referencing GPS data using dynamic segmentation tools. This architecture allows users to conduct travel time studies at various levels of resolution (from regionwide studies down to studies of signalized intersections). The data reduction and data reporting for such a system are outlined. Data reduction is based on linear referencing of GPS data using highway links, where highway links are defined as vector representations of directional centerlines delimited by physical discontinuities. Data reporting is based on the use of dynamic segmentation tools to compute travel time and speed along highway corridors using any highway segmentation scheme. The resulting aggregated data can be used for the production of tabular reports and color-coded maps to document travel time, delay, and speed data. The database management system built into TTG allows users to handle many GPS data files using a centralized, structured procedure, which is critical for data archival purposes and the development of client-server applications. In conclusion, quantitative values for data storage requirements and processing speeds are provided. Those values should be useful to practitioners currently designing travel time information systems.

This paper appears in Transportation Research Record No. 1660, Part 2: Improving Transportation Data.

English

p. 48-57

1999

Transportation Research Record

0309070570

Figures (11) ; References (9) ; Tables (1)

Data reduction; Data storage; Global Positioning System; Information processing; System design; Traffic delays; Traffic speed; Travel time

Data reporting; Dynamic segmentation; Linear referencing

Highways; Planning and Forecasting; I72: Traffic and Transport Planning

TRIS, TRB, ATRI

Sep 27 1999 12:00AM

• ACCURACY ISSUES WITH ROUTE CHOICE DATA COLLECTION BY USING GLOBAL POSITIONING SYSTEM
• ACCURACY OF LINEARLY REFERENCED DATA BY USING GEOGRAPHIC INFORMATION SYSTEMS
• ANALYSIS OF GLOBAL POSITIONING SYSTEM-BASED DATA COLLECTION METHODS FOR CAPTURING MULTISTOP TRIP-CHAINING BEHAVIOR
• ARCHITECTURE DEVELOPMENT FOR WEB-BASED GEOGRAPHIC INFORMATION SYSTEM APPLICATIONS IN TRANSPORTATION
• DYNAMIC EMERGENCY EVACUATION MANAGEMENT SYSTEM USING GEOGRAPHIC INFORMATION SYSTEM AND SPATIOTEMPORAL MODELS OF BEHAVIOR
• EMPIRICAL ANALYSIS OF ATTRITION AND UNDERREPORTING IN MAILBACK AND PERSONAL INTERVIEW PANEL SURVEYS
• ESTIMATION OF ANNUAL AVERAGE DAILY TRAFFIC FOR NONSTATE ROADS IN A FLORIDA COUNTY
• EVALUATING ROLE OF DISTANCE AND LOCATION IN STATEWIDE TRAVEL DEMAND FORECASTING BY USING AMERICAN TRAVEL SURVEY
• FORMULATION OF A TRANSPORTATION PROBLEM BY USING EXISTING DATA: CASE STUDY IN NORTHEASTERN ILLINOIS
• GEOGRAPHIC INFORMATION SYSTEM METHODOLOGY FOR ASSESSING GROWTH EFFECTS OF HIGHWAY IMPROVEMENTS
• INNOVATIVE COMMUTER SURVEYING TECHNIQUES USED IN ADVANCED TRANSPORTATION MANAGEMENT SYSTEM EVALUATION
• LINEAR REFERENCING SYSTEM FOR NORTH CAROLINA DEPARTMENT OF TRANSPORTATION
• NEURAL NETWORKS AS ALTERNATIVE TO TRADITIONAL FACTOR APPROACH TO ANNUAL AVERAGE DAILY TRAFFIC ESTIMATION FROM TRAFFIC COUNTS
• PROTOTYPE INTERNET APPLICATIONS FOR TRANSPORTATION SYSTEM MANAGEMENT
• SELF-DESCRIBING DATA TRANSFER METHODOLOGY FOR INTELLIGENT TRANSPORTATION SYSTEMS APPLICATIONS
• SYSTEM FOR LOGICAL VERIFICATION AND INFERENCE OF ACTIVITY (SYLVIA) DIARIES
• TOWARD NATIONAL INDICATORS OF VEHICLE TRAVEL AND TRAFFIC CONGESTION BASED ON REAL-TIME TRAFFIC DATA
• TRAFFIC IMPACT ANALYSIS BY USING GEOGRAPHIC INFORMATION SYSTEM TECHNOLOGY
• TRANSPORTATION PLANNING, POLICY, AND DATA: INEXTRICABLE LINKAGES
• USING THE INTERNET TO IMPROVE LONG-DISTANCE TRAVEL DATA COLLECTION