Maintenance and Construction Vehicle (Subsystem*)

The Maintenance and Construction Vehicle Subsystem (MCVS) resides in a maintenance, construction, or other specialized service vehicle or equipment and provides the sensory, processing, storage, and communications functions necessary to support highway maintenance and construction. All types of maintenance and construction vehicles are covered, including heavy equipment and supervisory vehicles. The subsystem provides two-way communications between drivers/operators and dispatchers and maintains and communicates current location and status information. A wide range of operational status is monitored, measured, and made available, depending on the specific type of vehicle or equipment. For example, for a snow plow, the information would include whether the plow is up or down and material usage information. The subsystem may also contain capabilities to monitor vehicle systems to support maintenance of the vehicle itself and other sensors that monitor environmental conditions including the road condition and surface weather information. This subsystem can represent a diverse set of mobile environmental sensing platforms, including wheeled vehicles and any other vehicle that collects and reports environmental information.

Functionality
Inputs/Outputs
Security
Subsystem Interfaces Diagram
Terminator Interfaces Diagram

Subsystem Interfaces Diagram

This is a context diagram for the entity Maintenance and Construction Vehicle Subsystem that shows the interfaces to subsystems and every architecture flow that this entity sends or receives, as defined in the National ITS Architecture. A complete list of all architecture flows shown on this diagram, is available under the Inputs/Outputs section on this page.

Get the Source Graphic, a Enhanced Windows Metafile (EMF), in ZIP format.

Terminator Interfaces Diagram

Get the Source Graphic, a Windows Metafile (WMF), in ZIP format.

Security Considerations:

The security considerations for the Maintenance and Construction Vehicle Subsystem relate to physical security of the vehicle, operators and the roadway on which the vehicle operates. The maintenance vehicles can be mobile environmental sensing platforms that could contribute to the detection, classification and response to security threats. Maintenance vehicles might be deployed as movable barriers in response to certain security threats. In general, the Maintenance and Construction Vehicle Subsystem’s information security needs to have a relatively low degree of confidentiality in order to safeguard the information. In addition, it is important but not essential that the information is available and has integrity in order to prevent improper reporting of the vehicle’s location and sensing capabilities.

Functionality: Equipment Packages* and PSpecs*

MCV Barrier System Control (Equipment Package*)
PSpecs:
- 9.3.1.2-Operate WZ Devices On-Board
- 9.3.2.4-Provide M&C Field Personnel Interface for Work Zones
MCV Environmental Monitoring (Equipment Package*)
PSpecs:
- 9.1.6-Provide M&C Vehicle Operator Interface for Maint
- 9.4.1-Collect Environmental Data On-Board
MCV Infrastructure Monitoring (Equipment Package*)
PSpecs:
- 9.1.1-Manage M&C Systems On-Board
MCV Roadway Maintenance and Construction (Equipment Package*)
PSpecs:
- 9.1.1-Manage M&C Systems On-Board
- 9.1.2-Collect M&C Vehicle Data On-Board
- 9.1.6-Provide M&C Vehicle Operator Interface for Maint
MCV Vehicle Location Tracking (Equipment Package*)
PSpecs:
- 9.1.2-Collect M&C Vehicle Data On-Board
MCV Vehicle Safety Monitoring (Equipment Package*)
PSpecs:
- 9.1.6-Provide M&C Vehicle Operator Interface for Maint
- 9.3.1.4-Monitor Crew Movement On-Board
- 9.3.2.1-Status Work Zone Activity
- 9.3.4.3-Detect Work Zone Intrusion On-Board
- 9.3.4.4-Provide On-Board Work Zone Intrusion Alert
MCV Vehicle System Monitoring and Diagnostics (Equipment Package*)
PSpecs:
- 9.1.2-Collect M&C Vehicle Data On-Board
- 9.1.6-Provide M&C Vehicle Operator Interface for Maint
MCV Winter Maintenance (Equipment Package*)
PSpecs:
- 9.1.1-Manage M&C Systems On-Board
- 9.1.2-Collect M&C Vehicle Data On-Board
- 9.1.6-Provide M&C Vehicle Operator Interface for Maint
MCV Work Zone Support (Equipment Package*)
PSpecs:
- 9.3.1.2-Operate WZ Devices On-Board
- 9.3.2.1-Status Work Zone Activity
- 9.3.2.4-Provide M&C Field Personnel Interface for Work Zones

Inputs/Outputs: Architecture Flows* and Data Flows*

Basic Maintenance and Construction Vehicle Maintenance and Construction Vehicle

maint and constr material information (Architecture Flow*) - Information on materials stored on the vehicle including quantity and current application rate.
Data Flows*:
- fbmcv-materials_status
maint and constr vehicle measures (Architecture Flow*) - Raw vehicle diagnostics and operating status data reported by the maintenance vehicle platform including engine temperature, mileage, tire wear, brake wear, belt wear, and other operational status measures. In addition to this general vehicle status, this flow also includes the status of maintenance and construction-specific systems on the vehicle.
Data Flows*:
- fbmcv-basic_mcv_measures

Location Data Source Maintenance and Construction Vehicle

position fix (Architecture Flow*) - Information which provides a traveler's or vehicle's geographical position.
Data Flows*:
- From_Location_Data_Source

Maintenance and Construction Field Personnel Maintenance and Construction Vehicle

crew movements (Architecture Flow*) - Visual or sensed presence of field crew location within a work zone that is monitored to enhance work zone safety.
Data Flows*:
- fmcfp-crew_movements
maint and constr field personnel inputs (Architecture Flow*) - User input from field personnel including current maintenance and construction status information as well as on-board device control.
Data Flows*:

Maintenance and Construction Management Maintenance and Construction Vehicle

environmental sensors control (Architecture Flow*) - Data used to configure and control environmental sensors.
Data Flows*:
- environmental_sensor_control_for_mcv
maint and constr dispatch information (Architecture Flow*) - Information used to dispatch maintenance and construction vehicles, equipment, and crews and information used to keep work zone crews informed. This information includes routing information, traffic information, road restrictions, incident information, environmental information, decision support information, maintenance schedule data, dispatch instructions, personnel assignments, alert notifications, and corrective actions.
Data Flows*:
maint and constr vehicle system control (Architecture Flow*) - Configure and control data that supports remote control of on-board maintenance and construction vehicle systems and field equipment that is remotely controlled by the vehicle. For example, the data can be used to adjust material application rates and spread patterns.
Data Flows*:

Maintenance and Construction Vehicle Basic Maintenance and Construction Vehicle

maint and constr vehicle control (Architecture Flow*) - Control data sent from on-board ITS systems to control maintenance and construction vehicle equipment, including control of materials dispersion rate and other control functions that will vary with vehicle type and application.
Data Flows*:
- tbmcv-vehicle_system_control

Maintenance and Construction Vehicle Driver

driver information (Architecture Flow*) - Regulatory, warning, and guidance information provided to the driver while en route to support safe and efficient vehicle operation.
Data Flows*:

Maintenance and Construction Vehicle Equipment Repair Facility

maint and constr vehicle conditions (Architecture Flow*) - Vehicle diagnostics information that is collected, filtered, and selectively reported by a maintenance and construction vehicle. The information includes engine temperature, mileage, tire wear, brake wear, belt wear, and any warnings or alarms concerning the operational condition of the vehicle and ancillary equipment.
Data Flows*:
- terf-basic_mcv_measures_for_equip_repair

Maintenance and Construction Vehicle Maintenance and Construction Field Personnel

maint and constr field personnel information presentation (Architecture Flow*) - Information presented to maintenance and construction field personnel including vehicle routing and traffic information, road restrictions, environmental information, decision support information, maintenance schedules, dispatch instructions, maintenance personnel assignments, vehicle maintenance information, work zone status information, and corrective actions.
Data Flows*:
maint and constr vehicle condition presentation (Architecture Flow*) - Presentation of vehicle diagnostics and operating status information to maintenance and construction field personnel including speed, engine temperature, mileage, tire wear, brake wear, belt wear, maintenance and construction system status, environmental sensor information, and other measures associated with the operation of a maintenance vehicle.
Data Flows*:
- tmcfp-vehicle_condition_status
work zone warning (Architecture Flow*) - Warnings provided to maintenance and construction field personnel, indicating a work zone emergency or safety issue such as the intrusion of a vehicle into the work zone area or movement of field crew into the travel lanes.
Data Flows*:
- tmcfp-work_zone_intrusion_alert_from_mcv
- tmcfp-work_zone_on_board_intrusion_warning

Maintenance and Construction Vehicle Maintenance and Construction Management

environmental sensor data (Architecture Flow*) - 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.
Data Flows*:
- environmental_sensor_data_from_mcv
- environmental_sensor_status_from_mcv
infrastructure conditions data (Architecture Flow*) - Current condition of pavement, bridges, culverts, signs, and other roadway infrastructure as measured by on-board sensors or read from infrastructure-based sensors. The data may include raw data or images (e.g., photo logs) that indicate the current status of the infrastructure.
Data Flows*:
- mcv_infrastructure_sensor_data
- mcv_infrastructure_sensor_status
maint and constr dispatch status (Architecture Flow*) - Current maintenance and construction status including work data, operator status, crew status, and equipment status.
Data Flows*:
maint and constr vehicle conditions (Architecture Flow*) - Vehicle diagnostics information that is collected, filtered, and selectively reported by a maintenance and construction vehicle. The information includes engine temperature, mileage, tire wear, brake wear, belt wear, and any warnings or alarms concerning the operational condition of the vehicle and ancillary equipment.
Data Flows*:
- basic_mcv_measures_for_maint_sched
- safety_data_for_fleet_mgmt
maint and constr vehicle location data (Architecture Flow*) - The current location and related status (e.g., direction and speed) of the maintenance/construction vehicle.
Data Flows*:
- vehicle_location_for_mcv_tracking
maint and constr vehicle operational data (Architecture Flow*) - Data that describes the maintenance and construction activity performed by the vehicle. Operational data includes materials usage (amount stored and current application rate), operational state of the maintenance equipment (e.g., blade up/down, spreader pattern), vehicle safety status, and other measures associated with the operation of a maintenance, construction, or other special purpose vehicle. Operational data may include basic operational status of the vehicle equipment or a more precise record of the work performed (e.g., application of crack sealant with precise locations and application characteristics).
Data Flows*:
work zone status (Architecture Flow*) - Current work zone status including current location (and future locations for moving work zones), impact to the roadway, required lane shifts, expected time(s) and duration of impact, anticipated delays, alternate routes, and suggested speed limits.
Data Flows*:
- work_zone_status_from_mcv
work zone warning status (Architecture Flow*) - Status of a work zone safety monitoring and warning devices. This flow documents system activations and includes additional supporting information (e.g., an image) that allows verification of the alarm.
Data Flows*:
- work_zone_intrusion_warning_notification

Maintenance and Construction Vehicle Other MCV

maint and constr vehicle status coordination (Architecture Flow*) - Maintenance and construction vehicle status information that is shared between vehicles. This includes environmental conditions and the operational status of the vehicles.
Data Flows*:
- tomcv-env_conditions
- tomcv-vehicle_operational_data
work zone warning notification (Architecture Flow*) - Notification of a work zone emergency or safety issue. This flow identifies that a work zone emergency or safety issue has occurred so that warnings may be generated by more than one system in the work zone.
Data Flows*:

Maintenance and Construction Vehicle Roadway

barrier system control (Architecture Flow*) - Information used to configure and control barrier systems that are represented by gates, barriers and other automated or remotely controlled systems used to manage entry to roadways.
Data Flows*:
- barrier_system_control_from_mcv
environmental sensor data (Architecture Flow*) - 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.
Data Flows*:
- environmental_sensor_data_for_roadway
environmental sensors control (Architecture Flow*) - Data used to configure and control environmental sensors.
Data Flows*:
- environmental_sensor_control_for_roadway
infrastructure monitoring sensor control (Architecture Flow*) - Data used to configure and control infrastructure monitoring sensors.
Data Flows*:
- infrastructure_sensor_control_from_mcv
roadway information system data (Architecture Flow*) - Information used to initialize, configure, and control roadside systems that provide driver information (e.g., dynamic message signs, highway advisory radio, beacon systems). This flow can provide message content and delivery attributes, local message store maintenance requests, control mode commands, status queries, and all other commands and associated parameters that support remote management of these systems.
Data Flows*:
- dms_data_from_mcv

Maintenance and Construction Vehicle Vehicle

vehicle signage data (Architecture Flow*) - In-vehicle signing data that augments regulatory, warning, and informational road signs and signals. The information provided would include static sign information (e.g., stop, curve warning, guide signs, service signs, and directional signs) and dynamic information (e.g., current signal states, grade crossing information, local traffic and road conditions, advisories, and detours).
Data Flows*:
- work_zone_intrusion_alert_on_board_for_in_vehicle_signing

Other MCV Maintenance and Construction Vehicle

maint and constr vehicle status coordination (Architecture Flow*) - Maintenance and construction vehicle status information that is shared between vehicles. This includes environmental conditions and the operational status of the vehicles.
Data Flows*:
- fomcv-env_conditions
- fomcv-vehicle_operational_data
work zone warning notification (Architecture Flow*) - Notification of a work zone emergency or safety issue. This flow identifies that a work zone emergency or safety issue has occurred so that warnings may be generated by more than one system in the work zone.
Data Flows*:

Roadway Maintenance and Construction Vehicle

barrier system status (Architecture Flow*) - Current operating status of barrier systems. Barrier systems represent gates, barriers and other automated or remotely controlled systems used to manage entry to roadways. Status of the systems includes operating condition and current operational state.
Data Flows*:
- barrier_system_status_to_mcv
environmental sensor data (Architecture Flow*) - 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.
Data Flows*:
- environmental_sensor_data_from_roadway
- environmental_sensor_status_from_roadway
infrastructure monitoring sensor data (Architecture Flow*) - Data read from infrastructure-based sensors that monitor the condition or integrity of transportation infrastructure including bridges, tunnels, interchanges, pavement, culverts, signs, transit rail or guideway, and other roadway infrastructure. Includes sensor data and the operational status of the sensors.
Data Flows*:
- infrastructure_sensor_data_for_mcv
- infrastructure_sensor_status_for_mcv
roadway information system status (Architecture Flow*) - Current operating status of dynamic message signs, highway advisory radios, beacon systems, or other configurable field equipment that provides dynamic information to the driver.
Data Flows*:
- dms_status_for_mcv
work zone warning notification (Architecture Flow*) - Notification of a work zone emergency or safety issue. This flow identifies that a work zone emergency or safety issue has occurred so that warnings may be generated by more than one system in the work zone.
Data Flows*:
- work_zone_intrusion_detection_for_on_board

Roadway Environment Maintenance and Construction Vehicle

environmental conditions (Architecture Flow*) - 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 are measured by environmental sensors.
Data Flows*:
- fre-environmental_conditions_at_roadway
roadway characteristics (Architecture Flow*) - Detectable or measurable road characteristics such as friction coefficient and general surface conditions, road geometry and markings, etc. These characteristics are monitored or measured by ITS sensors and used to support advanced vehicle safety and control and road maintenance capabilities.
Data Flows*:
- fre-roadway_characteristics_for_mcv
- fre-roadway_infrastructure_characteristics

Traffic Maintenance and Construction Vehicle

traffic characteristics (Architecture Flow*) - Physical traffic characteristics which are monitored and translated into macroscopic measures like occupancy, volume, density, and average speed. Point measures support presence detection and individual vehicle measures like speed.
Data Flows*:
- ftrf-vehicle_presence

Vehicle Maintenance and Construction Vehicle

safety system status (Architecture Flow*) - Current vehicle safety system status indicating the operating condition of these systems and the safety status of the vehicle and driver.
Data Flows*:
- safety_data_for_mcv