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6.2 - Collect ISP Services Data DFD

This DFD shows the eight processes that make up the Collect ISP Services Data facility within the Provide Driver and Traveler Services function. This facility collects data from other ITS functions as well as non-ITS sources to support various driver and traveler information and services applications.

The key points about the facility are as follows:

• Collects data concerning traffic including incidents, road conditions, tolls, maintenance and construction operations;
  
• Collects data concerning transit operations including routes, schedules, fares, etc.;
  
• Collects data from Multimodal Transportation Service Providers, including heavy rail services, ferry operators, airlines, pedestrian and cycling services;
  
• Collects traffic and environmental probe data from equipped vehicles, from short range communications equipment on the roadside, and from transit and electronic toll operations;
  
• Collects emergency information including wide-area alert information, disaster and evacuation information;
  
• Collects information from miscellaneous other sources including yellow pages service providers, parking systems, weather services, and event promoters;
  
• Performs data quality checks on all collected data;
  
• ISP Operator interface establishes data collection parameters;
  
• Data exchanged with other ISPs;
  
• Interface to map update provider for maps to support other ISP applications.
  

There are eight processes in this DFD:
a) Collect Misc Traveler Information (6.2.1)
b) Collect Traffic Data (6.2.2)
c) Collect Transit Operations Data (6.2.3)
d) Collect Multimodal Data (6.2.4)
e) Collect Probe Data from Vehicles (6.2.5)
f) Collect Emergency Traveler Data (6.2.6)
g) Provide ISP Operator Data Collection Interface (6.2.7)
h) Provide ISP Map Update Interface (6.2.8)

Each process can act fairly independently with parameters being set by the ISP operator in process (g). The data that is collected is provided to the broadcast traveler information application for travelers, and to the application which transmits traveler information to other operational centers. Upon request, the collected data is provided to the interactive traveler information applications as well as the trip planning and route guidance facilities.

DFD: 6.2 - Collect ISP Services Data

Parent DFD: 6 - Provide Driver and Traveler Services

PSpecs in this DFD:

• 6.2.1 - Collect Misc Traveler Information
  
• 6.2.2 - Collect Traffic Data
  
• 6.2.3 - Collect Transit Operations Data
  
• 6.2.4 - Collect Multimodal Data
  
• 6.2.5 - Collect Probe Data From Vehicles
  
• 6.2.6 - Collect Emergency Traveler Data
  
• 6.2.7 - Provide ISP Operator Data Collection Interface
  
• 6.2.8 - Provide ISP Map Update Interface