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• NTCIP 2102:2003, Point to Multi-Point Protocol Using FSK Modem Subnetwork Profile ($61);
• NTCIP 2103:2005, Point-to-Point Protocol over RS-232 Subnetwork Profile ($69);
• NTCIP 2104:2005, Ethernet Subnetwork Profile ($69);
• NTCIP 2201:2003, Transportation Transport Profile ($61); and
• NTCIP 2304:2002, Application Profile for DATEX-ASN ($56).

Since 1996, AASHTO (American Association of State Highway and Transportation Officials), ITE (Institute of Transportation Engineers), and NEMA (National Electrical Manufacturers Association) have been jointly developing the National Transportation Communications for ITS Protocol. The NTCIP is a family of communication protocols for traffic management devices.

NTCIP 2102:2003, SP-PMPP/FSK, is a subnetwork profile that applies to the data link and physical layers of a communications stack. The purpose of this standard is to provide the information necessary to establish a connection using the Point to Multi-Point Protocol (PMPP) via a 1200 bps frequency shift keying (FSK) modem interface.

NTCIP 2103:2005, SP-PPP/232, is a subnetwork profile that applies to the data link and physical layers of a communications stack. This standard specifies the use of an RS-232 interface at the physical layer. The RS-232 (now referred to as EIA/TIA 232) interface can serve as the interconnect method directly or act as an interface to other technologies. The direct interface is applicable where the transportation device is relatively close to the management station. Alternatively, the EIA/TIA 232 interface can serve as the interface to external modems.

NTCIP 2104:2005, SP-Ethernet, is a subnetwork profile that applies to the data link and physical layers of a communications stack. The purpose of the Ethernet Subnetwork Profile is to define a set of requirements for the implementation of the lower two layers of a communication stack that operates in a peer-to-peer network that has traditionally been associated with Local Area Networks. This profile provides a subset of the functions and services used in modern transportation control cabinets for roadside devices. Ethernet is now a viable subnetwork profile for high-speed exchange of information in roadside networks.

NTCIP 2201:2003, TTP, is a transport profile that specifies a set of protocols and standards applicable to the transport and network layers of the ISO OSI Basic Reference Model. This profile standard can provide connectionless transport service over a connectionless network service. The profile provides message transport and delivery services between transportation devices and a management station. NTCIP 2201 applies to transportation related devices that do not need network routing capabilities, but the profile includes a multiplexing scheme to handle multiple end-applications. The connectionless transport service is based upon the Internet's User Datagram Protocol (UDP).

NTCIP 2304:2002, AP-DATEX, is an application profile that applies to the session, presentation, and application layers of a communications stack. The standard defines an application profile for communications between management systems, which includes the requirements, and optional and conditional clauses, applicable to specific deployment environments. For the Application Layer, the NTCIP 2304 makes normative reference to ISO 14827-2, Transport Information and Control Systems – Data Exchanges Between Traffic Management and Information Centres – Part 2: DATEX-ASN.

The new standards are available from the NTCIP Web site, www.ntcip.org, as no-cost Adobe PDF downloads. This special offer is made possible by funding from the U.S. DOT’s Joint Program Office. The standards are also available in printed softcover editions.

To purchase softcover printed editions, contact the AASHTO Publications Bookstore at (800) 231-3475, or visit www.aashto.org.

Contact the ITE Bookstore at (202) 289-0222, ext. 130, 202-289-7722 (fax), or visit www.ite.org.

NEMA’s document sales are through Global Engineering Documents. Contact Global at (800) 854-7179, (303) 397-7956 (international), (303)397-2740 (fax), or visit www.global.ihs.com.

Founded in 1914, AASHTO serves its Member Departments, the U.S. Department of Transportation and the Congress, by providing leadership, technical services, information, and advice as well as by contributing to national policy on transportation issues. AASHTO is headquartered in Washington, D.C.

ITE is an international individual member educational and scientific association, and is one of the largest and fastest-growing multimodal professional transportation organizations in the world. Founded in 1930, the Institute is headquartered in Washington, D.C.

NEMA is the trade association of choice for the electrical manufacturing industry. Founded in 1926 and headquartered near Washington, D.C., its 430 member companies manufacture products used in the generation, transmission and distribution, control, and use of electricity. These products are used in utility, medical, industrial, commercial, institutional, and residential applications. Domestic production of electrical products sold worldwide exceeds $120 billion. In addition to its headquarters in Rosslyn, Virginia, NEMA also has offices in Beijing, Sao Paulo, and Mexico City.

Press/Public Relations Contacts:
NEMA Communications Department
Email: communications@nema.org
Phone: (703) 841-3286
Fax: (703) 841-3386