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Equipment Package: Standard Rail Crossing

Description: This equipment package manages highway traffic at highway-rail intersections (HRIs) where operational requirements do not dictate advanced features (e.g., where rail operational speeds are less than 80 miles per hour). Either passive (e.g., the crossbuck sign) or active warning systems (e.g., flashing lights and gates) are supported depending on the specific requirements for each intersection. These traditional HRI warning systems may also be augmented with other standard traffic management devices. The warning systems are activated on notification by interfaced wayside equipment of an approaching train. The equipment at the HRI may also be interconnected with adjacent signalized intersections so that local control can be adapted to highway-rail intersection activities. Health monitoring of the HRI equipment and interfaces is performed; detected abnormalities are reported through interfaces to the wayside interface equipment and the traffic management subsystem.
Included In: Caltrans Roadside Equipment
City of Elk Grove Field Equipment
City of Roseville Roadside Equipment
City of West Sacramento Roadside Equipment
Sacramento City Roadside Equipment
Sacramento County Roadside Equipment
Sacramento International Airport Roadside Equipment
Processes: 1.1.1.1 - Process Traffic Sensor Data
1.2.7.1 - Process Indicator Output Data for Roads
1.6.1.2.1 - Control HRI Traffic Signals
1.6.1.2.2 - Control HRI Warnings and Barriers
1.6.1.2.3 - Provide SSR Device Controls
1.6.1.2.5 - Manage Device Control
1.6.1.2.6 - Maintain Device State
1.6.1.3 - Perform Equipment Self-Test
1.6.1.4.2 - Provide Closure Parameters
1.6.1.4.4 - Report HRI Status on Approach
1.6.1.7.1 - Control Traffic Volume at Active HRI
1.6.1.7.2 - Close HRI on Command
1.6.3.1 - Interact with Wayside Systems
1.6.5.1 - Provide Interactive Interface
1.6.5.2 - Determine HRI Status
1.6.5.3 - Maintain HRI Closure Data
User Service Requirements: 1.0 - TRAVEL AND TRAFFIC MANAGEMENT
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 include a Traffic Control (TC) function. 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, and (4) Provide Information. This will also include control of network signal systems with eventual integration of freeway control.
1.6.2 - TC shall include a Traffic Surveillance function.
1.6.2.1 - Traffic Surveillance shall include a vehicle detection function with the capability of accurately detecting vehicles in a real-time fashion.
1.6.2.1.1 - Vehicle detection shall include the capability to determine those vehicles that are HOVs.
1.6.2.2 - Traffic Surveillance shall include a data collect function to provide the capability to collect data for determining traffic flow and prediction.
1.6.2.2.1 - The data collect function shall provide the capability to quickly feedback traffic data to the control processes.
1.6.2.3 - Traffic Surveillance shall include a wide-area surveillance capability to include several jurisdictions.
1.6.2.3.1 - The wide-area surveillance shall gather speed and flow information.
1.6.2.4 - TC shall provide the capability to acquire detailed traffic measurements at specific locations.
1.6.3 - TC shall include a Device Control function.
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 dynamically control traffic signing.
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.
1.7 - 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
1.8.0 - ITS shall include a Travel Demand Management (TDM) function. Travel Demand Management will generate and communicate management and control strategies that will support and facilitate the implementation of TDM programs, policies and regulations. It consists of two major functions, which are, (1) Increase Efficiency of Transportation System and (2) Provide Wide Variety of Mobility Options.
1.8.3 - TDM shall include a sensors/control function.
1.8.3.1 - The sensors/control function shall provide the capability to gather information needed for the generation of management and control strategies to include, but not be limited to the, following:
1.8.3.1(b) - Usage levels.
1.10 - HIGHWAY RAIL INTERSECTION
1.10.0 - 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.
1.10.1 - The Highway-Rail Intersection (HRI) function shall be applicable to operational, at-grade highway-rail intersections with train operational speeds up to 125 MPH.
1.10.1.1 - HRI users shall include light rail transit and rapid rail transit approaching and crossing HRIs.
1.10.1.2 - HRI users shall include commuter rail trains approaching and crossing HRIs.
1.10.1.3 - HRI users shall include freight and intercity passenger trains approaching and crossing HRIs.
1.10.1.6 - HRI users shall include train crews operating rail traffic while approaching and crossing HRIs.
1.10.1.7 - HRI users shall include rail maintenance and inspection vehicles approaching and crossing HRIs.
1.10.2 - HRI shall provide interfaces between highway and rail management functions.
1.10.2.1 - HRI shall provide information management interfaces between highway and rail to coordinate traffic, demand and schedules.
1.10.2.1.3 - HRI shall provide closure data to traffic management for in-vehicle traveler advisory messages.
1.10.2.2 - HRI shall provide the capability for interactive real-time interfaces.
1.10.2.2.1 - HRI shall provide the capability to interface with rail operations functions for rail traffic control information.
1.10.2.2.2 - HRI shall provide the capability to interface with traffic management functions for highway traffic coordination.
1.10.2.2.3 - HRI shall provide the capability to interface with trains approaching and crossing the HRI for traffic coordination.
1.10.2.2.4 - HRI shall provide the capability to interface with highway vehicles approaching and crossing HRIs for traffic control information.
1.10.3 - At all HRIs with active railroad warning systems, HRI shall manage the traffic in the intersection.
1.10.3.1 - HRI shall be capable of augmenting the intersection with standard highway traffic signal devices.
1.10.3.2 - HRI shall include an automated collision avoidance function for highway vehicles approaching HRIs.
1.10.3.3 - HRI shall provide an Intelligent Intersection Controller (IIC) function to manage highway and rail traffic in the intersection.
1.10.3.3.1 - IIC shall control active highway traffic signal devices at HRIs to manage highway traffic.
1.10.3.3.2 - IIC function shall control active railway warning devices, including flashing lights and physical barriers for highway and walkway lanes at HRIs.
1.10.3.3.3 - IIC function shall provide an intersection surveillance system to derive the real-time status of traffic in the intersection.
1.10.3.3.4 - IIC function shall report real-time HRI equipment status.
1.10.4 - HRI shall include a Standard Speed Rail (SSR) Subservice to manage highway and rail traffic at HRIs for rail lines with operational speeds less than 80 MPH.
1.10.4.1 - SSR shall include active railroad warning systems at designated HRIs.
1.10.4.2 - SSR shall include passive HRIs with non-active warning systems.
1.10.4.2.1 - SSR shall augment passive warning signs with additional highway traffic control devices at passive HRIs.
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.
1.10.5.1 - HSR shall include active roadside message devices to provide highway closure information at HSR HRIs.
1.10.5.2 - HSR shall provide special safety features to enhance safety.
1.10.5.2.1 - HSR shall close the HRI to highway traffic at a predetermined time (up to three minutes) before train arrival or when directed by train operations.
1.10.5.2.2 - HSR shall include a positive barrier function (e.g. four quadrant gates) to close the intersection to highway traffic for rail lines operating at speeds over 110 MPH.
1.10.5.2.6 - HSR shall provide HRI status to highway vehicles as either a "STOP FOR TRAIN" or a "PROCEED" indication.
8.0 - MAINTENANCE AND CONSTRUCTION MANAGEMENT
8.1 - MAINTENANCE AND CONSTRUCTION OPERATIONS
8.1.2 - Maintenance and Construction Operations shall provide a Roadway Management (RWM) function to monitor traffic, road surface, and environmental conditions and forecast traffic and road surface conditions to support management of routine and hazardous road condition remediation and to communicate changes in conditions. This function includes interactions among Traffic Managers, Supervisors, Dispatchers, Field Crews, Construction Crews, Asset Managers, Planning Agencies, and Weather Services Organizations.
8.1.2.1 - RWM shall support a number of different services, including but not limited to:
8.1.2.1(e) - Repair activities
8.1.3 - Maintenance and Construction Operations shall provide a Work Zone Management and Safety (WZMS) function, which provides support for the effectiveness, safety, and efficiency of roadway operations during all work zone activities. This function includes interactions among Traffic Managers, Supervisors, Dispatchers, Field Crews, Construction Crews, Public Safety Organizations, Information Service Providers, and Travelers.
8.1.3.1 - WZMS shall monitor, control, and direct activity in the vicinity of work zones.
8.1.3.1.3 - WZMS shall be able to divert vehicles around work zones via automated lane changing techniques.
8.1.3.1.3.1 - WZMS shall collect information used to support automated lane changing, including but not limited to:
8.1.3.1.3.1(a) - Volume
8.1.3.1.3.1(b) - Occupancy
8.1.3.1.3.1(c) - Speed
8.1.3.1.3.1(d) - Headways
8.1.3.1.3.1(e) - Vehicle characteristics
8.1.3.1.3.1(f) - Merging distance

Last updated: 04-29-05