OKI Regional ITS Architecture

US: GTFS real-time - Secure Wireless Internet (ITS)

Description

This solution is used within the U.S.. It combines standards associated with US: GTFS real–time with those for I–M: Secure Wireless Internet (ITS). The US: GTFS real–time standards include upper–layer standards required to implement real–time, public, transit–related communications. The I–M: Secure Wireless Internet (ITS) standards include lower–layer standards that support secure communications between two entities, either or both of which may be mobile devices, but they must be stationary or only moving within wireless range of a single wireless access point (e.g., a parked car). Security is based on X.509 or IEEE 1609.2 certificates. A non–mobile (if any) endpoint may connect to the service provider using any Internet connection method.

Includes Standards

Level	DocNum	FullName	Description
ITS Application Entity	GTFS Realtime	General Transit Feed Specification Realtime	This document defines a feed specification that allows public transportation agencies to provide real–time updates about their fleet to application developers. It is an extension to GTFS (General Transit Feed Specification), an open data format for public transportation schedules and associated geographic information. GTFS Realtime was designed around ease of implementation, good GTFS interoperability and a focus on passenger information.
Facilities	IETF RFC 7230	Hypertext Transfer Protocol (HTTP/1.1): Message Syntax and Routing	This standard (RFC) defines the main Application Layer protocol used for the world–wide web.
Facilities	ISO 21320–1	Information technology — Document Container File — Part 1: Core	ISO/IEC 21320–1 specifies the core requirements for 1) document container files, and 2) implementations that produce and/or consume document container files. It normatively references the Zip File Format Specification version 6.3.3 of PKWARE(R) Inc. Document container files are conforming Zip files as specified by that document.
Facilities	IETF RFC 4180	Common Format and MIME Type for Comma–Separated Values (CSV) Files	This standard (RFC) documents the format used for Comma–Separated Values (CSV) files and registers the associated MIME type "text/csv".

Readiness: High–Moderate

Readiness Description

One significant or possibly a couple minor issues. For existing deployments, the chosen solution likely has identified security or management issues not addressed by the communications solution. Deployers should consider additional security measures, such as communications link and physical security as part of these solutions. They should also review the management issues to see if they are relevant to their deployment and would require mitigation. For new deployments, the deployment efforts should consider a path to addressing these issues as a part of their design activities. The solution does not by itself provide a fully secure implementation without additional work.

Issues

Issue	Severity	Description	Associated Standard	Associated Triple
Performance not fully defined (medium)	Medium	The performance rules are not fully defined for this information flow.	(None)	(All)
Secure data access not provided	Medium	The solution does not define rules on how the application entity authenticates requests to accept or provide data.	(None)	(All)
Not a standard (minor)	Low	The document is publicly available and widely used but it is not currently a formal standard.	GTFS Realtime	(All)

Supports Interfaces

Source	Destination	Flow
BCRTA Transit Vehicles	BCRTA Transit System Dispatch	transit vehicle location data
BCRTA Transit Vehicles	BCRTA Transit System Dispatch	transit vehicle schedule performance
Cincinnati Streetcar Rail Vehicles	SORTA Riverfront Transit Center	transit vehicle location data
Cincinnati Streetcar Rail Vehicles	SORTA Riverfront Transit Center	transit vehicle schedule performance
CTC Transit Vehicles	CTC Transit Dispatch	transit vehicle location data
CTC Transit Vehicles	CTC Transit Dispatch	transit vehicle schedule performance
Local Transit Vehicles	Local Transit Systems	transit vehicle location data
Local Transit Vehicles	Local Transit Systems	transit vehicle schedule performance
RAMP Transit Vehicles	TANK Transit System Dispatch	transit vehicle location data
RAMP Transit Vehicles	TANK Transit System Dispatch	transit vehicle schedule performance
School Buses	School District Dispatch	transit vehicle location data
School Buses	School District Dispatch	transit vehicle schedule performance
SORTA ACCESS Vehicles	SORTA Riverfront Transit Center	transit vehicle schedule performance
SORTA ACCESS Vehicles	SORTA Transit Dispatch Center	transit vehicle location data
SORTA ACCESS Vehicles	SORTA Transit Dispatch Center	transit vehicle schedule performance
SORTA Fixed Route Vehicles	SORTA Riverfront Transit Center	transit vehicle schedule performance
SORTA Fixed Route Vehicles	SORTA Transit Dispatch Center	transit vehicle location data
SORTA Fixed Route Vehicles	SORTA Transit Dispatch Center	transit vehicle schedule performance
TANK Transit Vehicles	TANK Transit System Dispatch	transit vehicle location data
TANK Transit Vehicles	TANK Transit System Dispatch	transit vehicle schedule performance
University of Cincinnati Shuttle Vehicles	University of Cincinnati Shuttle Dispatch	transit vehicle location data
University of Cincinnati Shuttle Vehicles	University of Cincinnati Shuttle Dispatch	transit vehicle schedule performance