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

Description:

This solution is used within Canada and 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.

Relevant Regions:

• Canada
• United States

Comm Profile: I-M: Secure Wireless Internet (ITS)

Comm Class: WAN - Wide Area Network

Level	Standard
Access	Wireless Internet Alternatives (NA)
Mgmt	Bundle: SNMPv3 MIB
Security	Secure Session Alternatives
TransNet	Internet Transport Alternatives
TransNet	IP Alternatives

Data Profile: US: GTFS real-time

Level	Standard
Facilities	IETF RFC 4180 CSV Files
Facilities	IETF RFC 7159 JSON
Facilities	IETF RFC 9110 HTTP Semantics
Facilities	IETF RFC 9112 HTTP/1.1
Facilities	ISO 21320-1 ZIP
ITS Application Entity	General Transit Feed Specification - Realtime

Solution Issues Severity: 10

Solution Issues:

Default	Severity	Name	Type	Description
False	Low	Overlap of standards (Minor)	Overlap	Multiple standards have been developed to address this information and it is unclear which standard should be used to address this specific information flow. However, as this information transfer is infrastructure-based, agencies can deploy a solution throughout their jurisdiction with minimal downside and can use gateways to connect to other technologies.
False	Low	Time synchronization	Performance / Applicability Gap	The standard requires a highly accurate time shared between participants.
False	Medium	Overlap of standards	Overlap	Multiple standards have been developed to address this information and it is unclear which standard should be used to address this specific information flow.
False	Medium	Uncertainty about trust revocation mechanism	Security Gap	The mechanisms used to prevent bad actors from sending authorized messages is unproven.
False	Medium	Unvetted by community	Standardization Gap	The proposed solution uses a suite of standards that is accepted within some communities, but has not necessarily been accepted for use within the context of this information triple.
False	High	Regulatory Issue	Standardization Gap	Deployment of this standard is subject to regulatory approval, which is not currently expected to be granted for deployments in the near-term.
True	Low	Not a standard (minor)	Standardization Gap	The document is publicly available and widely used but it is not currently a formal standard.
True	Medium	Outdated security reference	Security Gap	The standard solution includes an outdated security reference.
True	Medium	Performance not fully defined (medium)	ITS Info Gap	The performance rules are not fully defined for this information flow.
True	Medium	Secure data access not provided	Security Gap	The solution does not define rules on how the application entity authenticates requests to accept or provide data.

Solution to Triples

Source	Flow	Destination
Transit Vehicle OBE	transit vehicle location data	Transit Management Center
Transit Vehicle OBE	transit vehicle schedule performance	Transit Management Center