TxDOT - Dallas District Roadway Devices

Status

Existing

Description

TxDOT roadway devices are are controlled by operators at TxDOT Traffic Management Centers.These devices aid operators in the traffic management center with the monitoring and managing of traffic conditions. The field equipment that aids these operators include or will include Traffic Signal Systems, railway guards, traffic detection, DMS and CCTV Cameras.

Stakeholders

StakeholderRoleRole Status
TxDOT – Dallas DistrictOwnsExisting

Physical Objects

ITS Roadway Equipment
Connected Vehicle Roadside Equipment

Functional Objects

Functional ObjectDescriptionUser Defined
Roadway Barrier System Control'Roadway Barrier System Control' includes the field equipment that controls barrier systems used to control access to transportation facilities and infrastructure. Barrier systems include automatic or remotely controlled gates, barriers and other access control systems.False
Roadway Basic Surveillance'Roadway Basic Surveillance' monitors traffic conditions using fixed equipment such as loop detectors and CCTV cameras.False
Roadway Dynamic Lane Management and Shoulder Use'Roadway Dynamic Lane Management and Shoulder Use' includes the field equipment, physical overhead lane signs and associated control electronics that are used to manage and control specific lanes and/or the shoulders. This equipment can be centrally controlled by a Traffic Management Center or it can be autonomous and monitor traffic conditions and demand along the roadway and determine how to change the lane controls to respond to current conditions. Lane controls can be used to change the lane configuration of the roadway, reconfigure intersections and/or interchanges, allow use of shoulders as temporary travel lanes, designate lanes for use by special vehicles only, such as buses, high occupancy vehicles (HOVs), vehicles attending a special event, etc. and/or prohibit or restrict types of vehicles from using particular lanes. Guidance and information for drivers can be posted on dynamic message signs.False
Roadway Environmental Monitoring'Roadway Environmental Monitoring' measures environmental conditions and communicates the collected information back to a center where it can be monitored and analyzed or to other field devices to support communications to vehicles. A broad array of general weather and road surface information may be collected. Weather conditions that may be measured include temperature, wind, humidity, precipitation, and visibility. Surface and sub–surface sensors can measure road surface temperature, moisture, icing, salinity, and other measures.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 HOV Control'Roadway HOV Control' monitors and controls high occupancy vehicle (HOV) and high occupancy toll (HOT) lanes. It includes traffic sensors that monitor HOV lane usage and display equipment such as lane control signals that provide lane status to drivers.False
Roadway Incident Detection'Roadway Incident Detection' provides incident detection using traffic detectors and surveillance equipment. It monitors for unusual traffic conditions that may indicate an incident or processes surveillance images, watching for potential incidents. It provides potential incident information as well as traffic flow and images to the center for processing and presentation to traffic operations personnel.False
Roadway Signal Control'Roadway Signal Control' includes the field elements that monitor and control signalized intersections. It includes the traffic signal controllers, detectors, conflict monitors, signal heads, and other ancillary equipment that supports traffic signal control. It also includes field masters, and equipment that supports communications with a central monitoring and/or control system, as applicable. The communications link supports upload and download of signal timings and other parameters and reporting of current intersection status. It represents the field equipment used in all levels of traffic signal control from basic actuated systems that operate on fixed timing plans through adaptive systems. It also supports all signalized intersection configurations, including those that accommodate pedestrians. In advanced, future implementations, environmental data may be monitored and used to support dilemma zone processing and other aspects of signal control that are sensitive to local environmental conditions.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
Roadway Variable Speed Limits'Roadway Variable Speed Limits' includes the field equipment, physical overhead lane signs and associated control electronics that are used to manage and control variable speed limits systems. This equipment monitors traffic and environmental conditions along the roadway. The system can be centrally monitored and controlled by a Traffic Management Center or it can be autonomous, calculating and setting suitable speed limits, usually by lane. This application displays the speed limits and additional information such as basic safety rules and current traffic information to drivers.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 Safety'Roadway Work Zone Safety' includes field elements that detect vehicle intrusions in work zones and warns crew workers and drivers of imminent encroachment. Crew movements are also monitored so that the crew can be warned of movement beyond the designated safe zone.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
RSE Automated Vehicle Operations'RSE Automated Vehicle Operations' includes the field elements that monitor and control access to and egress from automated lanes. It monitors and coordinates automated vehicle operations within the lanes. These lanes support vehicles operating in platoons with short headways.False
RSE CACC Operations'RSE CACC Operations' provides infrastructure support for formation and dissolution of strings of CACC–equipped vehicles and provides operating parameters to the strings of vehicles including string length, recommended speeds, and gaps.False

Physical Standards

SDODocument #TitleUser Defined
ITEITE ATC 5201Advanced Transportation Controller (ATC)False
ITE ATC 5202Model 2070 Controller StandardFalse
ITE ATC APIApplication Programming Interface (API) Standard for the Advanced Transportation Controller (ATC)False
ITE ITS CabinetITS Standard Specification for Roadside CabinetsFalse
NEMANEMA TS 2Traffic Controller Assemblies with NTCIP RequirementsFalse
NEMA 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
USDOTRSU V4USDOT Roadside Unit (RSU) Specification Document – Version 4False

Interfaces To

(View Context Diagram)

Traveler Vehicles
TxDOT – Dallas District Maintenance and Construction Management Center
TxDOT – Dallas District Maintenance and Construction Vehicles
TxDOT – Dallas District Traffic Management Center (DalTrans)