OKI Regional ITS Architecture

US: NTCIP Signal Priority - SNMPv3/TLS

Description

This solution is used within the U.S.. It combines standards associated with US: NTCIP Signal Priority with those for I–F: SNMPv3/TLS. The US: NTCIP Signal Priority standards include upper–layer standards required to implement center–to–field traffic signal control priority communications (e.g., for busses and emergency vehicles). The I–F: SNMPv3/TLS standards include lower–layer standards that support secure center–to–field and field–to–field communications using simple network management protocol (SNMPv3); implementations are strongly encouraged to use the TLS for SNMP security option for this solution to ensure adequate security.

Includes Standards

Level	DocNum	FullName	Description
Mgmt	NTCIP 1201	NTCIP Global Object (GO) Definitions	This standard defines SNMP objects (data elements) used by a wide range of field devices like time and versioning information.
Security	IETF RFC 6353	Transport Layer Security (TLS) Transport Model for the Simple Network Management Protocol (SNMP)	This standard (RFC) defines how to use the TLS authentication service to provide authentication within the access control mechanism of SNMP.
ITS Application Entity	NTCIP 1202	NTCIP Object Definitions for ASC	This standard defines SNMP objects (data elements) for a center to control a traffic signal and its interface with connected vehicles.
ITS Application Entity	NTCIP 1211	NTCIP Objects for SCP	This standard defines SNMP objects (data elements) to monitor and control signal control priority systems for signal controllers.
Facilities	NTCIP 1202	NTCIP Object Definitions for ASC	This standard defines SNMP objects (data elements) for a center to control a traffic signal and its interface with connected vehicles.
Facilities	NTCIP 1211	NTCIP Objects for SCP	This standard defines SNMP objects (data elements) to monitor and control signal control priority systems for signal controllers.

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
Out of date (medium)	Medium	The standard includes normative references to other standards that have been subject to significant changes that can impact interoperability or security of systems and the industry has not specified if and how these updates should be implemented for deployments of this standard.	IETF RFC 6353 TLS for SNMP	(All)
Update data to SNMPv3	Low	Data has been defined for SNMPv1, but needs to be updated to SNMPv3 format.	(None)	(All)
Use TLS for SNMP Option	Low	The standard allows for multiple security mechanisms. The only defined mechanism that meets the requirements for C–ITS is the one based on TLS.	(None)	(All)

Supports Interfaces

Source	Destination	Flow
Cincinnati Field Equipment	Cincinnati Traffic Control Center	right–of–way request notification
City and County Connected Vehicle Roadside Equipment	Cincinnati Field Equipment	signal preemption request
City and County Connected Vehicle Roadside Equipment	Cincinnati Field Equipment	signal priority service request
City and County Connected Vehicle Roadside Equipment	Cincinnati Field Equipment	signal service request
City and County Connected Vehicle Roadside Equipment	City and County Field Equipment	signal preemption request
City and County Connected Vehicle Roadside Equipment	City and County Field Equipment	signal priority service request
City and County Connected Vehicle Roadside Equipment	City and County Field Equipment	signal service request
City and County Connected Vehicle Roadside Equipment	Hamilton County Field Equipment	signal preemption request
City and County Connected Vehicle Roadside Equipment	Hamilton County Field Equipment	signal priority service request
City and County Connected Vehicle Roadside Equipment	Hamilton County Field Equipment	signal service request
City and County Field Equipment	City and County Traffic Control Center	right–of–way request notification
City and County Field Equipment	Other City and County Traffic Control Centers	right–of–way request notification
Hamilton County Field Equipment	Hamilton County Signal Operations	right–of–way request notification
INDOT Connected Vehicle RSE	INDOT Traffic Signal Roadway Equipment	signal preemption request
INDOT Connected Vehicle RSE	INDOT Traffic Signal Roadway Equipment	signal priority service request
INDOT Connected Vehicle RSE	INDOT Traffic Signal Roadway Equipment	signal service request
INDOT Field Equipment	INDOT Traffic Operations Center	right–of–way request notification
INDOT Traffic Signal Roadway Equipment	INDOT Traffic Operations Center	right–of–way request notification
INDOT Traffic Signal Roadway Equipment	INDOT Traffic Signal Control System	right–of–way request notification
KYTC District 6 Field Equipment	KYTC District 6 Traffic Operations Center	right–of–way request notification
KYTC Traffic Signal Roadway Equipment	KYTC Traffic Signal Control System	right–of–way request notification
ODOT / KYTC Connected Vehicle Roadside Equipment	KYTC District 6 Traffic Operations Center	right–of–way request notification
ODOT / KYTC Connected Vehicle Roadside Equipment	KYTC Traffic Signal Roadway Equipment	signal preemption request
ODOT / KYTC Connected Vehicle Roadside Equipment	KYTC Traffic Signal Roadway Equipment	signal priority service request
ODOT / KYTC Connected Vehicle Roadside Equipment	KYTC Traffic Signal Roadway Equipment	signal service request
ODOT / KYTC Connected Vehicle Roadside Equipment	ODOT Traffic Signal Roadway Equipment	signal preemption request
ODOT / KYTC Connected Vehicle Roadside Equipment	ODOT Traffic Signal Roadway Equipment	signal priority service request
ODOT / KYTC Connected Vehicle Roadside Equipment	ODOT Traffic Signal Roadway Equipment	signal service request
ODOT District 8 Field Equipment	Other ODOT Traffic Operations Center	right–of–way request notification
ODOT Traffic Signal Roadway Equipment	ODOT Traffic Signal Control System	right–of–way request notification