Central Ohio Regional ITS Architecture

ODOT Ramp Meters

Status

Existing

Description

Ramp meters are traffic signals at freeway entrance ramps, which use radar detection positioned on the ramp and freeway to determine how quickly drivers can safely enter the freeway. Ramp meters have sensors that measure traffic speed and volume on the freeway, and traffic demand on the ramp. ODOT deploys 30 ramp meters.

Stakeholders

Stakeholder	Role	Role Status
Ohio Department of Transportation (ODOT)	Owns	Existing

Physical Objects

ITS Roadway Equipment

Functional Objects

Functional Object	Description	User Defined
Roadway Basic Surveillance	'Roadway Basic Surveillance' monitors traffic conditions using fixed equipment such as loop detectors and CCTV cameras.	False
Roadway Field Device Support	'Roadway Field Device Support' monitors the operational status of field devices and detects and reports fault conditions. Consolidated operational status (device status, configuration, and fault information) are reported for resolution and repair. A local interface is provided to field personnel for local monitoring and diagnostics, supporting field maintenance, upgrade, repair, and replacement of field devices.	False
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 Traffic Metering	'Roadway Traffic Metering' includes the field equipment used to meter traffic on ramps, through interchanges, and on the mainline roadway. The equipment includes dynamic messages signs to provide guidance and information to drivers at and approaching a meter, including information for any special bypass lanes.	False

Physical Standards

SDO	Document #	Title	User Defined
ITE	ITE ATC 5201	Advanced Transportation Controller (ATC)	False
	ITE ATC 5202	Model 2070 Controller Standard	False
	ITE ATC API	Application Programming Interface (API) Standard for the Advanced Transportation Controller (ATC)	False
	ITE ITS Cabinet	ITS Standard Specification for Roadside Cabinets	False
NEMA	NEMA TS 2	Traffic Controller Assemblies with NTCIP Requirements	False
	NEMA TS 4	Hardware Standards for Dynamic Message Signs (DMS) with NTCIP Requirements	False
	NEMA TS 8	Cyber and Physical Security for Intelligent Transportation Systems (ITS)	False

Interfaces To

(View Context Diagram)

ODOT ATMS
ODOT District Offices