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WX04: Roadway Micro-Prediction

This service package supports advanced systems which use environmental information collected from ITS roadway equipment or from the Surface Transportation Weather Service, along with advanced algorithms, to create micro-predictions of roadway conditions which can support improved safety warnings and maintenance planning and dispatch.

International Icon Origin: Canada

Relevant Regions: Australia, Canada, European Union, and United States

Enterprise

Development Stage Roles and Relationships

Installation Stage Roles and Relationships

Operations Stage Roles and Relationships
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Source Destination Role/Relationship
ITS Roadway Equipment Manager ITS Roadway Equipment Manages
ITS Roadway Equipment Owner ITS Roadway Equipment Owns
ITS Roadway Equipment Owner ITS Roadway Equipment Manager Operations Agreement
ITS Roadway Equipment Owner Maint and Constr Management Center Owner Information Exchange Agreement
ITS Roadway Equipment Owner Surface Transportation Weather Service Owner Information Exchange Agreement
ITS Roadway Equipment Owner Traffic Management Center Owner Information Exchange Agreement
ITS Roadway Equipment Supplier ITS Roadway Equipment Owner Warranty
Maint and Constr Center Personnel Maint and Constr Management Center Operates
Maint and Constr Management Center Manager Maint and Constr Center Personnel System Usage Agreement
Maint and Constr Management Center Manager Maint and Constr Management Center Manages
Maint and Constr Management Center Owner ITS Roadway Equipment Owner Information Exchange Agreement
Maint and Constr Management Center Owner Maint and Constr Management Center Owns
Maint and Constr Management Center Owner Maint and Constr Management Center Manager Operations Agreement
Maint and Constr Management Center Owner Surface Transportation Weather Service Owner Information Exchange Agreement
Maint and Constr Management Center Owner Traffic Management Center Owner Information Exchange Agreement
Maint and Constr Management Center Supplier Maint and Constr Management Center Owner Warranty
Surface Transportation Weather Service Manager Surface Transportation Weather Service Manages
Surface Transportation Weather Service Owner ITS Roadway Equipment Owner Information Exchange Agreement
Surface Transportation Weather Service Owner Maint and Constr Management Center Owner Information Exchange Agreement
Surface Transportation Weather Service Owner Surface Transportation Weather Service Owns
Surface Transportation Weather Service Owner Surface Transportation Weather Service Manager Operations Agreement
Surface Transportation Weather Service Owner Traffic Management Center Owner Information Exchange Agreement
Surface Transportation Weather Service Supplier Surface Transportation Weather Service Owner Warranty
Traffic Management Center Manager Traffic Management Center Manages
Traffic Management Center Manager Traffic Operations Personnel System Usage Agreement
Traffic Management Center Owner ITS Roadway Equipment Owner Information Exchange Agreement
Traffic Management Center Owner Maint and Constr Management Center Owner Information Exchange Agreement
Traffic Management Center Owner Surface Transportation Weather Service Owner Information Exchange Agreement
Traffic Management Center Owner Traffic Management Center Owns
Traffic Management Center Owner Traffic Management Center Manager Operations Agreement
Traffic Management Center Supplier Traffic Management Center Owner Warranty
Traffic Operations Personnel Traffic Management Center Operates

Maintenance Stage Roles and Relationships

Physical

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Includes Physical Objects:

Physical Object Class Description
ITS Roadway Equipment Field 'ITS Roadway Equipment' represents the ITS equipment that is distributed on and along the roadway that monitors and controls traffic and monitors and manages the roadway. This physical object includes traffic detectors, environmental sensors, traffic signals, highway advisory radios, dynamic message signs, CCTV cameras and video image processing systems, grade crossing warning systems, and ramp metering systems. Lane management systems and barrier systems that control access to transportation infrastructure such as roadways, bridges and tunnels are also included. This object also provides environmental monitoring including sensors that measure road conditions, surface weather, and vehicle emissions. Work zone systems including work zone surveillance, traffic control, driver warning, and work crew safety systems are also included.
Maint and Constr Center Personnel Center The people that directly interface with a Maintenance and Construction Management Center. These personnel interact with fleet dispatch and management systems, road maintenance systems, incident management systems, work plan scheduling systems, and work zone management systems. They provide operator data and command inputs to direct system operations to varying degrees depending on the type of system and the deployment scenario.
Maint and Constr Management Center Center The 'Maint and Constr Management Center' monitors and manages roadway infrastructure construction and maintenance activities. Representing both public agencies and private contractors that provide these functions, this physical object manages fleets of maintenance, construction, or special service vehicles (e.g., snow and ice control equipment). The physical object receives a wide range of status information from these vehicles and performs vehicle dispatch, routing, and resource management for the vehicle fleets and associated equipment. The physical object participates in incident response by deploying maintenance and construction resources to an incident scene, in coordination with other center physical objects. The physical object manages equipment at the roadside, including environmental sensors and automated systems that monitor and mitigate adverse road and surface weather conditions. It manages the repair and maintenance of both non-ITS and ITS equipment including the traffic controllers, detectors, dynamic message signs, signals, and other equipment associated with the roadway infrastructure. Weather information is collected and fused with other data sources and used to support advanced decision support systems.

The physical object remotely monitors and manages ITS capabilities in work zones, gathering, storing, and disseminating work zone information to other systems. It manages traffic in the vicinity of the work zone and advises drivers of work zone status (either directly at the roadside or through an interface with the Transportation Information Center or Traffic Management Center physical objects.)

Construction and maintenance activities are tracked and coordinated with other systems, improving the quality and accuracy of information available regarding closures and other roadway construction and maintenance activities.
Surface Transportation Weather Service Center The 'Surface Transportation Weather Service' represents the providers of value-added sector-specific meteorological services. These providers utilize National Weather Service data and predictions, road condition information and local environmental data provided by traffic management or maintenance organizations, and their own models to provide surface transportation related weather observations and forecasts including pavement temperature and conditions.
Traffic Management Center Center The 'Traffic Management Center' monitors and controls traffic and the road network. It represents centers that manage a broad range of transportation facilities including freeway systems, rural and suburban highway systems, and urban and suburban traffic control systems. It communicates with ITS Roadway Equipment and Connected Vehicle Roadside Equipment (RSE) to monitor and manage traffic flow and monitor the condition of the roadway, surrounding environmental conditions, and field equipment status. It manages traffic and transportation resources to support allied agencies in responding to, and recovering from, incidents ranging from minor traffic incidents through major disasters.
Traffic Operations Personnel Center 'Traffic Operations Personnel' represents the people that operate a traffic management center. These personnel interact with traffic control systems, traffic surveillance systems, incident management systems, work zone management systems, and travel demand management systems. They provide operator data and command inputs to direct system operations to varying degrees depending on the type of system and the deployment scenario.

Includes Functional Objects:

Functional Object Description Physical Object
MCM Environmental Information Collection 'MCM Environmental Information Collection' collects current road and weather conditions using data collected from environmental sensors deployed on and about the roadway. In addition to fixed sensor stations at the roadside, this functional object also collects environmental information from sensor systems located on Maintenance and Construction Vehicles. It also collects current and forecast environmental conditions information that is made available by other systems. The functional object aggregates the sensor system data and provides it, along with data attributes to other applications. Maint and Constr Management Center
MCM Road Weather Micro-Prediction 'MCM Road Weather Micro-Prediction' uses road weather data and advanced algorithms to create micro-predictions of roadway conditions, or receives micro-predictions from external sources, which can support improved maintenance planning and dispatch. Maint and Constr Management Center
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 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 metrics. ITS Roadway Equipment
TMC Environmental Monitoring 'TMC Environmental Monitoring' assimilates current and forecast road conditions and surface weather information using a combination of weather service provider information, information collected by other centers such as the Maintenance and Construction Management Center, data collected from environmental sensors deployed on and about the roadway, and information collected from connected vehicles. The collected environmental information is monitored and presented to the operator. This information can be used to issue general traveler advisories and support location specific warnings to drivers. Traffic Management Center
TMC Road Weather Micro-Prediction 'TMC Road Weather Micro-Prediction' uses road weather data and advanced algorithms to create micro-predictions of roadway conditions, or receives micro-predictions from external sources, which can support improved traffic management. Traffic Management Center

Includes Information Flows:

Information Flow Description
environmental conditions data Current road conditions (e.g., surface temperature, subsurface temperature, moisture, icing, treatment status) and surface weather conditions (e.g., air temperature, wind speed, precipitation, visibility) as measured and reported by fixed and/or mobile environmental sensors and aggregated by the data collector. Attributes relating to the data collection (and aggregation) are also included.
environmental sensor data Current road conditions (e.g., surface temperature, subsurface temperature, moisture, icing, treatment status) and surface weather conditions (e.g., air temperature, wind speed, precipitation, visibility) as measured and reported by fixed and/or mobile environmental sensors. Operational status of the sensors is also included.
environmental sensors control Data used to configure and control environmental sensors.
maint and constr center personnel input User input from maintenance and construction center personnel including routing information, scheduling data, dispatch instructions, device configuration and control, resource allocations, alerts, incident and emergency response plan coordination.
maint and constr operations information presentation Presentation of maintenance and construction operations information to center personnel. This information includes maintenance resource status (vehicles, equipment, and personnel), work schedule information, work status, road and weather conditions, traffic information, incident information and associated resource requests, security alerts, emergency response plans and a range of other information that supports efficient maintenance and construction operations and planning.
qualified environmental conditions data Current road conditions (e.g., surface temperature, subsurface temperature, moisture, icing, treatment status) and surface weather conditions (e.g., air temperature, wind speed, precipitation, visibility) that has had quality checks performed on it and has been formatted and consolidated by the Clarus system. Attributes relating to the data collection (and aggregation) are also included.
roadway micro forecast Forecast of weather and roadway conditions at a fine level of resolution (e.g. for individual links in the road network).
traffic operator data Presentation of traffic operations data to the operator including traffic conditions, current operating status of field equipment, maintenance activity status, incident status, video images, security alerts, emergency response plan updates and other information. This data keeps the operator appraised of current road network status, provides feedback to the operator as traffic control actions are implemented, provides transportation security inputs, and supports review of historical data and preparation for future traffic operations activities.
traffic operator input User input from traffic operations personnel including requests for information, configuration changes, commands to adjust current traffic control strategies (e.g., adjust signal timing plans, change DMS messages), and other traffic operations data entry.

Goals and Objectives

Associated Planning Factors and Goals

Planning Factor Goal
B. Increase the safety of the transportation system for motorized and nonmotorized users; Achieve a significant reduction in traffic fatalities and serious injuries on all public roads
D. Increase the accessibility and mobility of people and for freight; Achieve a significant reduction in congestion
F. Enhance the integration and connectivity of the transportation system, across and between modes, for people and freight; Enhance the integration and connectivity of the transportation system

Associated Objective Categories

Objective Category
Travel Weather Management: Detours for Impacted Roadways
Travel Weather Management: Disseminating Information
Travel Weather Management: Road Weather Information System Coverage

Associated Objectives and Performance Measures

Objective Performance Measure
Increase by X percent of significant travel routes covered by weather-related diversion plans by year Y. Percent of significant travel routes covered by weather-related diversion plans.
Increase the percent of agencies that have adopted multi-agency weather-related transportation operations plans and that are involved in transportation operations during weather events to X percent by year Y. Percent of agencies involved in transportation operations during weather events that have adopted multi-agency, weather-related transportation operations plans.
Increase the percent of major road network (or transit network or regional bicycle network) covered by weather sensors or a road weather information system (RWIS) by X percent in Y years as defined by an RWIS station within Z miles. Percent of major road (transit or bicycle) network within Z miles of an RWIS station.
Reduce time to alert travelers of travel weather impacts (using variable message signs, 511, road weather information systems, public information broadcasts, the agency's website, Web 2.0 technologies, etc.) by X (time period or percent) in Y years. Time from beginning of weather event to posting of traveler information on (variable message signs, 511, Road Weather Information Systems, public information broadcasts etc.).
Reduce time to alert travelers of travel weather impacts (using variable message signs, 511, road weather information systems, public information broadcasts, the agency's website, Web 2.0 technologies, etc.) by X (time period or percent) in Y years. Time from beginning of weather event to posting of traveler information on agency website.


 
Since the mapping between objectives and service packages is not always straight-forward and often situation-dependent, these mappings should only be used as a starting point. Users should do their own analysis to identify the best service packages for their region.

Needs and Requirements

Need Functional Object Requirement
01 Traffic operations or maintenance and construction operations need be able to collect detailed road conditions and weather data from environmental sensors on or in the vicinity of the roadway. MCM Environmental Information Collection 10 The center shall collect environmental data from sensors that measure road surface temperature, moisture, icing, salinity, and other measures.
Roadway Environmental Monitoring 04 The field element's environmental sensors shall be remotely controlled by a traffic management center.
TMC Environmental Monitoring 06 The traffic center shall be able to share the collected environmental data with Maintenance and construction operations.
02 Weather Systems need be able to collect detailed road conditions and weather data from environmental sensors on or in the vicinity of the roadway. Roadway Environmental Monitoring 02 The field element shall include environmental sensors that measure weather conditions including temperature, wind, humidity, precipitation, and visibility.
TMC Environmental Monitoring 01 The traffic center shall remotely control environmental sensors that measure road surface conditions including temperature, moisture, icing, salinity, and other measures.
03 Maintenance and construction operations need to process collected environmental information to develop detailed micro-predictions to support maintenance planning and operations. MCM Environmental Information Collection 11 The center shall provide weather and road condition information to traffic management operations.
MCM Road Weather Micro-Prediction 01 The center shall assimilate current and forecast road conditions and surface weather information using a combination of weather service provider information (such as the National Weather Service and value-added sector specific meteorological services), and environmental data collected from sensors deployed on and about the roadway.
02 The center shall be able to receive road condition information from weather service providers.
03 The center shall provide value-added sector specific meteorological services with information on basic road facility and treatment information that supports forecasts for road conditions.
04 The center shall use the various data inputs of environmental sensors and road weather data to develop a view of current and micro-predicted road weather and road conditions.
04 Traffic operations need to process collected environmental information to develop detailed micro-predictions to support accurate local advisory systems. TMC Road Weather Micro-Prediction 01 The center shall assimilate current and forecast road conditions and surface weather information using a combination of weather service provider information (such as the National Weather Service and value-added sector specific meteorological services), and environmental data collected from sensors deployed on and about the roadway.
02 The center shall be able to receive road condition information from weather service providers.
03 The center shall provide value-added sector specific meteorological services with information on basic road facility and treatment information that supports forecasts for road conditions.
04 The center shall use the various data inputs of environmental sensors and road weather data to develop a view of current and micro-predicted road weather and road conditions.

Related Sources

Document Name Version Publication Date
ITS Architecture for Canada - Version 3
ITS User Services Document 1/1/2005


Security

In order to participate in this service package, each physical object should meet or exceed the following security levels.

Physical Object Security
Physical Object Confidentiality Integrity Availability Security Class
ITS Roadway Equipment Moderate High Moderate Class 3
Maint and Constr Management Center Moderate Moderate Moderate Class 2
Surface Transportation Weather Service Moderate Moderate Moderate Class 2
Traffic Management Center Moderate Moderate Moderate Class 2



In order to participate in this service package, each information flow triple should meet or exceed the following security levels.

Information Flow Security
Source Destination Information Flow Confidentiality Integrity Availability
Basis Basis Basis
ITS Roadway Equipment Maint and Constr Management Center environmental sensor data Low High Moderate
Little to no impact if this data is observed WYO believes this to be MODERATE or HIGH depending on the application Updates are valuable only if they are timely.
ITS Roadway Equipment Surface Transportation Weather Service environmental sensor data Low Moderate Moderate
Little to no impact if this data is observed This data should be correct, as it may be used to establish safe speeds and determine road treatments. Updates are valuable only if they are timely.
ITS Roadway Equipment Traffic Management Center environmental sensor data Low Moderate Moderate
Little to no impact if this data is observed info should be correct to determine safe speeds etc.; DISC: WYO believes this to be HIGH Updates are desireable but slightly outdated information will not be catastrophic.
Maint and Constr Center Personnel Maint and Constr Management Center maint and constr center personnel input High High High
Direct interactions between personnel and systems in a backoffice environment are effectively protected by physical means, so long as the interaction is in a dedicated facility. If this interaction is virtual (i.e. ,the MCMC is not directly in front of the MCMC Personnel, like in a cloud-based system) then the user's input requires some degree of obfuscation depending on sensitivity of information. Given that this could include information about compromised or ineffectual systems, including security systems, the potential for damage is high. Thus, HIGH. Backoffice operations flows should generally be correct and available as these are the primary interface between operators and system. Backoffice operations flows should generally be correct and available as these are the primary interface between operators and system.
Maint and Constr Management Center ITS Roadway Equipment environmental sensors control Moderate Moderate Moderate
Control flows, even for seemingly innocent devices, should be kept confidential to minimize attack vectors. While an individual installation may not be particularly impacted by a cyberattack of its sensor network, another installation might be severely impacted, and different installations are likely to use similar methods, so compromising one leads to compromising all. DISC: WYO believes this to be MODERATE. Control flows, even for seemingly innocent devices, should have MODERATE integrity at minimum, just to guarantee that intended control messages are received. Incorrect, corrupted, intercepted and modified control messages can or will result in target field devices not behaving according to operator intent. The severity of this depends on the type of device, which is why some devices are set MODERATE and some HIGH. Control flow availability is related to the criticality of being able to remotely control the device. For most devices, this is MODERATE. For purely passive devices with no incident relationship, this will be LOW. All devices should have default modes that enable them to operate without backhaul connectivity, so no device warrants a HIGH.
Maint and Constr Management Center Maint and Constr Center Personnel maint and constr operations information presentation Not Applicable Moderate Moderate
System maintenance flows should have some protection from casual viewing, as otherwise imposters could gain illicit control over field equipment Information presented to backoffice system operators must be consistent or the operator may perform actions that are not appropriate to the real situation. The backoffice system operator should have access to system operation. If this interface is down then control is effectively lost, as without feedback from the system the operator has no way of knowing what is the correct action to take.
Maint and Constr Management Center Surface Transportation Weather Service environmental conditions data Low Moderate Low
Little to no impact if this data is observed This data should be correct, as it may be used to establish safe speeds and determine road treatments. There should be other mechanisms for determining this data; in areas and times of severe weather this might be MODERATE.
Maint and Constr Management Center Traffic Management Center environmental conditions data Low Moderate Low
Little to no impact if this data is observed This data should be correct, as it may be used to establish safe speeds and determine road treatments. There should be other mechanisms for determining this data; in areas and times of severe weather this might be MODERATE.
Surface Transportation Weather Service ITS Roadway Equipment environmental sensors control Moderate Moderate Moderate
Control flows, even for seemingly innocent devices, should be kept confidential to minimize attack vectors. While an individual installation may not be particularly impacted by a cyberattack of its sensor network, another installation might be severely impacted, and different installations are likely to use similar methods, so compromising one leads to compromising all. DISC: WYO believes this to be MODERATE. Control flows, even for seemingly innocent devices, should have MODERATE integrity at minimum, just to guarantee that intended control messages are received. Incorrect, corrupted, intercepted and modified control messages can or will result in target field devices not behaving according to operator intent. The severity of this depends on the type of device, which is why some devices are set MODERATE and some HIGH. Control flow availability is related to the criticality of being able to remotely control the device. For most devices, this is MODERATE. For purely passive devices with no incident relationship, this will be LOW. All devices should have default modes that enable them to operate without backhaul connectivity, so no device warrants a HIGH.
Surface Transportation Weather Service Maint and Constr Management Center qualified environmental conditions data Low Moderate Moderate
If this data were exposed there would be little to no harm, except that the exposure was not authorized and the sender had no knowledge of downstream data usage. That alone is difficult to judge as 'serious harm' so left at LOW. Since the point of this particular flow is to provide data that is already quality checked, corruption of this data would have a significant negative impact on the users of this data. This flow is used to help determine what road treatments should be performed. If unavailable then other mechanisms would be used, but these would degrade the overall quality of road condition estimatation; if that estimate fails to suggest the correct treatment method, the cost to mobility and maintenance could be signficant.
Surface Transportation Weather Service Maint and Constr Management Center roadway micro forecast Low Moderate Low
Should eventually be public, and regardless it is unlikely that sharing this data will cause any harm. Could be used to make traffic management and personnel decisions, so some guarantee the data at the destination is what the sender intended is warranted. Still, this flow is a candidate for LOW if the range for integrity is opened up to include it. Unlikely that the lack of this flow will radically change outcomes.
Surface Transportation Weather Service Traffic Management Center qualified environmental conditions data Low Moderate Moderate
If this data were exposed there would be little to no harm, except that the exposure was not authorized and the sender had no knowledge of downstream data usage. That alone is difficult to judge as 'serious harm' so left at LOW. Since the point of this particular flow is to provide data that is already quality checked, corruption of this data would have a significant negative impact on the users of this data. This flow is used to help determine what road operations actions should be taken. If unavailable then other mechanisms would be used, but these would degrade the overall quality of road condition estimation; if that estimate fails to suggest the correct actions, the cost to mobility could be signficant.
Surface Transportation Weather Service Traffic Management Center roadway micro forecast Low Moderate Low
Should eventually be public, and regardless it is unlikely that sharing this data will cause any harm. Could be used to make traffic management and personnel decisions, so some guarantee the data at the destination is what the sender intended is warranted. Still, this flow is a candidate for LOW if the range for integrity is opened up to include it. Unlikely that the lack of this flow will radically change outcomes.
Traffic Management Center ITS Roadway Equipment environmental sensors control Moderate Moderate Low
Control flows, even for seemingly innocent devices, should be kept confidential to minimize attack vectors. While an individual installation may not be particularly impacted by a cyberattack of its sensor network, another installation might be severely impacted, and different installations are likely to use similar methods, so compromising one leads to compromising all. DISC: THEA, WYO believe this to be LOW: encrypted, authenticated, proprietary; but should not cause severe damage if seen Should be accurate and not be tampered with; could enable outside control of traffic sensors but should not cause severe harm, but could cause issues with environmental sensor data received and be detrimental to operations; DISC: WYO believes this may be HIGH for some applications Control flow availability is related to the criticality of being able to remotely control the device. For most devices, this is MODERATE. For purely passive devices with no incident relationship, this will be LOW. All devices should have default modes that enable them to operate without backhaul connectivity, so no device warrants a HIGH. From THEAwant updates but delayed information will not be severe; should be able to operate from a previous/default control/config; DISC: WYO believes this to be MODERATE
Traffic Management Center Maint and Constr Management Center environmental conditions data Low Moderate Low
Little to no impact if this data is observed This data should be correct, as it may be used to establish safe speeds and determine road treatments. There should be other mechanisms for determining this data; in areas and times of severe weather this might be MODERATE.
Traffic Management Center Surface Transportation Weather Service environmental conditions data Low Moderate Low
Little to no impact if this data is observed This data should be correct, as it may be used to establish safe speeds and determine road treatments. There should be other mechanisms for determining this data; in areas and times of severe weather this might be MODERATE.
Traffic Management Center Traffic Operations Personnel traffic operator data Moderate Moderate Moderate
Backoffice operations flows should have minimal protection from casual viewing, as otherwise imposters could gain illicit control or information that should not be generally available. Information presented to backoffice system operators must be consistent or the operator may perform actions that are not appropriate to the real situation. The backoffice system operator should have access to system operation. If this interface is down then control is effectively lost, as without feedback from the system the operator has no way of knowing what is the correct action to take.
Traffic Operations Personnel Traffic Management Center traffic operator input Moderate High High
Backoffice operations flows should have minimal protection from casual viewing, as otherwise imposters could gain illicit control or information that should not be generally available. Backoffice operations flows should generally be correct and available as these are the primary interface between operators and system. Backoffice operations flows should generally be correct and available as these are the primary interface between operators and system.

Standards

The following table lists the standards associated with physical objects in this service package. For standards related to interfaces, see the specific information flow triple pages.

Name Title Physical Object
ITE ATC ITS Cabinet Intelligent Transportation System Standard Specification for Roadside Cabinets ITS Roadway Equipment
NEMA TS 8 Cyber and Physical Security Cyber and Physical Security for Intelligent Transportation Systems ITS Roadway Equipment
Maint and Constr Management Center
Traffic Management Center