Chattanooga Regional ITS Architecture

TDOT DMS

Status: Existing

Description

TDOT dynamic message signs for traffic information dissemination.

Stakeholders

Stakeholder	Role	Role Status
TDOT	Owns	Existing

Physical Objects

ITS Roadway Equipment
Connected Vehicle Roadside Equipment

Functional Objects

Functional Object	Description	User Defined
Roadway Traffic Information Dissemination	'Roadway Traffic Information Dissemination' includes field elements that provide information to drivers, including dynamic message signs and highway advisory radios.	False
Roadway Work Zone Traffic Control	'Roadway Work Zone Traffic Control' controls traffic in areas of the roadway where maintenance and construction activities are underway, monitoring and controlling traffic using field equipment such as CCTV cameras, dynamic messages signs, and gates/barriers. Work zone speeds and delays are provided to the motorist prior to the work zones.	False

Physical Standards

Document Number	Title	Description
ITE ATC 5201	Advanced Transportation Controller	This standard defines the functionality and performance requirements for a modern ITS controller known as an ATC. It is similar to the NEMA TS–2 standard in that it defines basic capabilities but leaves hardware choices up to the manufacturer.
ITE ATC 5202	Model 2070 Controller Standard	This standard specifies the hardware for a modern, open–architecture controller for ITS applications that can run Linux and is capable of executing advanced signal controller logic, among other things.
ITE ATC 5301	Intelligent Transportation System Standard Specification for Roadside Cabinets	This standard specifies the characteristics of a modern controller cabinet for the ITS industry.
ITE ATC 5401	Application Programming Interface Standard for the Advanced Transportation Controller	This standard defines the application programmers' interface (API) that should be supported by an ATC, which is an open–architecture controller that can host multiple ITS applications.
NEMA TS 5	Portable Traffic Signal Systems (PTSS) Standard	This standard specifies traffic signaling equipment used to enable and expedite the safe movement of vehicle traffic and the performance of work zone activities.
NEMA TS 8	Cyber and Physical Security for Intelligent Transportation Systems	This specification describes how agencies and other transportation infrastructure owner/operators should implement cyber– and physical–security for ITS.
NEMA TS2	Traffic Controller Assemblies with NTCIP Requirements	This specification covers traffic signaling equipment used to facilitate and expedite the safe movement of pedestrians and vehicular traffic.
NEMA TS4	Hardware Standards for Dynamic Message Signs (DMS) With NTCIP Requirements	This standard provides hardware specifications for safe, dependable, functional, and easily maintained Dynamic Message Sign (DMS) equipment.
USDOT RSU	Dedicated Short–Range Communications Roadside Unit Specifications (FHWA–JPO–17–589)	This document will specify the requirements for roadside units (RSU) to serve as a network edge device for 5.9GHz DSRC infrastructure.

Interfaces To

(View Context Diagram)

Municipal/State ActiveITS Platform
Private Vehicle
TDOT HAR
TDOT Lane Control Signals
TDOT Overheight Vehicle Detection
TDOT Region 2 TMC – Chattanooga
TDOT Statewide Information for Travelers (SWIFT)
THP District 2 Office