Local Portable Dynamic Message Signs (DMS)
Portable (and often trailer–mounted) dynamic message signs are used to alter traffic patterns near work zones and to provide traffic management for sporting events, natural disasters, and other temporary changes in normal traffic patterns. The messages displayed on the sign can be programmed locally on the unit's control panel or remotely via computer or phone on units equipped with a cellular modem.
For example, the City of Hilliard uses portable DMS primarily for work zone management purposes. The City does not own/operate any dynamic portable message signs. The City uses them in some of its construction projects. These signs are owned & operated by the contractor – not the City.
The City of Upper Arlington uses portable DMS primarily for work zone management purposes.
OSU Transportation and Parking Division owns a total of 4 portable DMS to provide work zone information.
|Functional Object||Description||User 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|
|SDO||Document #||Title||User Defined|
|ITE||ITE ITS Cabinet||ITS Standard Specification for Roadside Cabinets||False|
|NEMA||NEMA TS 4||Hardware Standards for Dynamic Message Signs (DMS) with NTCIP Requirements||False|
|NEMA TS 5||Portable Traffic Signal Systems (PTSS) Standard Control Circuit and Pilot Devices||False|
|NEMA TS 8||Cyber and Physical Security for Intelligent Transportation Systems (ITS)||False|
(View Context Diagram)