| 1.0 | TRAVEL AND TRAFFIC MANAGEMENT |
| 1.10 | Highway-Rail Intersection |
| 1.10.0 | Highway-Rail Intersection. ITS shall include a Highway-Rail Intersection (HRI) function to control highway and rail traffic in at-grade HRIs. Two sub-services are supported: Standard Speed Rail Subservice which is applicable to light rail transit, commuter rail and heavy rail trains with operational speeds up to 79 miles per hour (MPH); and High Speed Rail Subservice which is applicable to all passenger and freight trains with operational speeds from 80 to 125 MPH. |
| 1.10.3 | At all HRIs with active railroad warning systems, HRI shall manage the traffic in the intersection. |
| 1.10.3.3 | HRI shall provide an Intelligent Intersection Controller (IIC) function to manage highway and rail traffic in the intersection. |
| 1.10.3.3.5 | IIC function shall report real-time HRI traffic status as advisories or alerts. |
| 1.10.5 | HRI shall provide a High Speed Rail (HSR) Subservice for HRIs on rail lines with operational speeds between 80 and 125 MPH. |
| 1.10.5.2 | HSR shall provide special safety features to enhance safety. |
| 1.10.5.2.6 | HSR shall provide HRI status to highway vehicles as either a "STOP FOR TRAIN" or "PROCEED" indication. |
| 1.5.2 | TSI shall include an Information Access function that allows travelers to access the available information. |
| 1.5.2.5 | Information Access shall provide the capability for travelers to access the TSI information via any of, but not limited to, the following methods: |
| 1.5.2.5(a) | Highway advisory radio. |
| 1.6 | TRAFFIC CONTROL |
| 1.6.0 | ITS shall provide a Traffic Control capability. Traffic Control provides the capability to efficiently manage the movement of traffic on streets and highways. Four functions are provided which are (1) Traffic Flow Optimization, (2) Traffic Surveillance, (3) Control Function, and (4) Provide Information. This will also include control of network signal systems with eventual integration of freeway control. |
| 1.6.1 | Traffic Control shall include a Flow Optimize function to provide the capability to optimize traffic flow. |
| 1.6.1.1 | The Flow Optimize function shall employ control strategies that seek to maximize traffic-movement efficiency. |
| 1.6.1.1.1 | Traffic-movement control shall manage movement of traffic on streets. |
| 1.6.1.1.2 | Traffic-movement control shall manage movement of traffic on highways. |
| 1.6.1.1.3 | Traffic-movement control shall include the goal of minimizing delay times. |
| 1.6.1.1.4 | Traffic-movement control shall include the goal of minimizing energy use. |
| 1.6.1.1.5 | Traffic-movement control shall include the goal of minimizing air quality impacts due to traffic. |
| 1.6.1.2 | The Flow Optimize function shall include a Wide Area optimization capability, to include several jurisdictions. |
| 1.6.1.2.1 | Wide area optimization shall integrate the control of network signal systems with the control of freeways. |
| 1.6.1.2.2 | Wide area optimization shall include features that provide preferential treatment for transit vehicles. |
| 1.6.1.2.3 | Wide area optimization shall include features that provide preferential treatment for HOV. |
| 1.6.1.3 | Flow optimize shall be implemented in a manner that seeks to optimize traffic movement over a large geographic area. |
| 1.6.1.4 | Flow optimize shall include a Control function that is responsive to both the current demand as well as the expected demand. |
| 1.6.1.4.1 | Control shall include the capability to facilitate the dissipation of traffic congestion. |
| 1.6.1.5 | Flow Optimize shall provide the capability to predict travel patterns. |
| 1.6.1.6 | The Control Function shall include the use of data acquired from traffic surveillance as feedback to the control strategies. |
| 1.6.1.7 | Implementation of the Control Function shall include strategies that account for at least the following: |
| 1.6.1.7(a) | Human factors. |
| 1.6.1.7(b) | Driver/traveler behavior and expectancies. |
| 1.6.2 | Traffic Control shall include a Traffic Surveillance function. |
| 1.6.2.2 | Traffic Surveillance shall include a Data Collect function to provide the capability to collect data that are needed for determining traffic flow and prediction. |
| 1.6.2.2.1 | Data Collect shall provide the capability to quickly feedback traffic data to the control processes. |
| 1.6.2.3 | Traffic Surveillance shall include an area wide surveillance capability to include several jurisdictions. |
| 1.6.2.3.2 | The area wide surveillance shall cover a large number of roadway segments. |
| 1.6.2.4 | Traffic Control shall provide the capability to acquire detailed traffic measurements at specific locations. |
| 1.6.2.4.1 | Traffic Surveillance shall include a Data Process function to process the traffic data which are acquired. |
| 1.6.3 | Traffic Control shall include a Control Function. |
| 1.6.3.1 | The Device Control Function shall include a "real-time" traffic-adaptive control capability. |
| 1.6.3.2 | The real-time traffic-adaptive control portion of the Control Function shall be an area wide control to include several jurisdictions. |
| 1.6.3.2.1 | The area wide control shall be implemented in an integrated and consistent manner that avoids the issuance of conflicting controls. |
| 1.6.3.2.2 | The area wide control shall be implemented in a manner that permits the following types of vehicles to have preference over other vehicles being controlled. |
| 1.6.3.3 | The Device Control Function shall provide the capability to exercise control over those devices utilized for traffic control. |
| 1.6.3.3.1 | Device Control shall include the capability to control traffic signalization, including rapid modification of signalization parameters to respond to traffic requirements. |
| 1.6.3.3.2 | Device Control shall include the capability to control dynamically traffic signing. |
| 1.6.3.3.3 | Device Control shall include the capability to control freeway ramp metering. |
| 1.6.3.3.4 | Device Control shall include the capability to exercise dynamic control over the infrastructure (such as reversible-lanes, turning restrictions, etc.). |
| 1.6.3.4 | Device Control shall communicate control data to the following devices. |
| 1.6.3.4(a) | Traffic signals. |
| 1.6.3.4(e) | Human operator support. |
| 1.6.3.4.1 | Traffic Surveillance shall include a Data Process function to process the traffic data which are acquired. |
| 1.6.3.5 | Device Control shall provide the operator with the capability to manually override the system's automatic controls. |
| 1.6.3.6 | Device Control shall provide the operator the capability to adaptively change system response in order to provide a coordinated support of other TMCs that are responding to incidents. |
| 1.7 | INCIDENT MANAGEMENT |
| 1.7.1 | Incident Management shall provide an incident identification function to identify incidents. |
| 1.7.1.1 | The incident identification function shall include the capability to identify predicted incidents. |
| 1.7.1.1.1 | The incident identification function shall use information from the following types of sources, where available, to identify predicted incidents: |
| 1.7.1.1.1(a) | Traffic flow sensors. |
| 1.8 | TRAVEL DEMAND MANAGEMENT |
| 1.8.1 | TDM shall include a communications function. |
| 1.8.1.4 | The communications function shall provide the capability to send information and data is needed to implement management and control strategies that respond to changing environments, conditions, and policy needs to include, but not limited to, the following: |
| 1.8.1.4(a) | Sensor data. |
| 1.8.2 | TDM shall include a processing function. |
| 1.8.2.3 | Strategies developed by the processing function shall include the guidance for the operation of physical systems that: |
| 1.8.2.3(a) | Monitor traffic. |
| 1.8.2.3(d) | Detect traffic. |
| 5.0 | EMERGENCY MANAGEMENT |
| 5.2 | EMERGENCY VEHICLE MANAGEMENT |
| 5.2.3 | Emergency Vehicle Management Service shall be provided by a Signal Priority System. |
| 5.2.3.1 | Signal Priority System shall maintain real-time information on signal timing, emergency vehicle locations and emergency vehicle routing. |
| 5.2.3.2 | Signal Priority System shall determine signal prioritize timing sequences for relevant signals. |
| 7.0 | Information Management |
| 7.1 | Archived Data Function |
| 7.1.0 | ITS shall provide an Archived Data Function to control the archiving and distribution of ITS data. The Archived Data User Service provides the Historical Data Archive Repositories and controls the archiving functionality for all ITS data with five major functions: 1) the Operational Data Control function to manage operations data integrity; 2) the Data Import and Verification function to acquire historical data from the Operational Data Control function; 3) the Automatic Data Historical Archive function for permanently archiving the data; 4) the Data Warehouse Distribution function, which integrates the planning, safety, operations, and research communities into ITS and processes data products for these communities; and 5) the ITS Community Interface which provides the ITS common interface to all ITS users for data products specification and retrieval. ADUS helps achieve the ITS information goal of unambiguous interchange and reuse of data and information throughout all functional areas. |
| 7.1.3 | The Archived Data Function shall include a Data Import and Verification (DIV) function to acquire historical data from the Operational Data Control function. |
| 7.1.3.1 | DIV shall be capable of importing selected ITS Operational data from the ITS Operational Repositories. |
| 7.1.3.1.9 | DIV shall be capable of importing data on ITS Physical Characteristics of Transportation Infrastructure to include: |
| 7.1.3.1.9(a) | Roadway network attributes. |
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