ODOT Dynamic Message Signs (DMS)

Status

Existing

Description

A dynamic (or also variable) message sign (DMS) is an electronic traffic sign used on roadways to give travelers information about special events. DMS signs warn of traffic congestion, accidents, incidents, roadwork zones, or speed limits on a specific highway segment. ODOT provides a total of 15 DMS along its freeways to provide accident, work zone and amber alert information.

Stakeholders

StakeholderRoleRole Status
Ohio Department of Transportation (ODOT)OwnsExisting and Planned
Ohio Department of Transportation (ODOT)OwnsExisting

Physical Objects

ITS Roadway Equipment

Functional Objects

Functional ObjectDescriptionUser Defined
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 Time Management'Roadway Time Management' provides foundational time keeping functionality that supports an accurate, synchronized time reference in ITS field equipment. It receives accurate time information from an external source and maintains a local time reference using an internal clock in between time synchronizations.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 Warning'Roadway Warning' includes the field equipment used to warn drivers approaching hazards on a roadway. Warnings may be generated in response to roadway weather conditions, road surface conditions, traffic conditions including queues, obstacles or animals in the roadway, and any other transient events that can be sensed. The equipment monitors traffic and roadway conditions and may send data to a Traffic Management Center for processing or may process it to determine when a warning should be issued. When it is determined that a warning should be issued, the equipment is used to alert approaching drivers via dynamic warning signs, flashing lights, in–vehicle messages, etc.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

SDODocument #TitleUser Defined
ITEITE ITS CabinetITS Standard Specification for Roadside CabinetsFalse
NEMANEMA TS 4Hardware Standards for Dynamic Message Signs (DMS) with NTCIP RequirementsFalse
NEMA TS 5Portable Traffic Signal Systems (PTSS) Standard Control Circuit and Pilot DevicesFalse
NEMA TS 8Cyber and Physical Security for Intelligent Transportation Systems (ITS)False

Interfaces To

(View Context Diagram)

Commercial Vehicle Driver
ODOT ATMS
ODOT Connected Vehicle Roadside Equipment
ODOT District Offices
ODOT Maintenance Garages