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TMC Freeway Management Equipment Package

Architecture Geographic Scope

Description:

Control system for efficient freeway management including integration of surveillance information with freeway road geometry, vehicle control such as ramp metering, CMS, HAR. Interface to coordinated traffic subsystems for information dissemination to the public.

 

Included in:

TxDOT Amarillo TMC

Processes:

1.1.4.2Provide Traffic Operations Personnel Traffic Data Interface
1.2.2.1Determine Indicator State for Freeway Management
1.2.3Determine Ramp State
1.2.4.2Output Control Data for Freeways
  

User Service Requirements (fully or partially addressed):

1.0TRAVEL AND TRAFFIC MANAGEMENT
1.5.2TSI shall include an Information Access function that allows travelers to access the available information.
1.5.2.5Information 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.
1.6TRAFFIC CONTROL
1.6.0ITS 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.
1.6.1TC shall include a Traffic Flow Optimization function to provide the capability to optimize traffic flow.
1.6.1.1Traffic Flow Optimization shall employ control strategies that seek to maximize traffic-movement efficiency.
1.6.1.1.1Traffic-movement control shall manage movement of traffic on streets.
1.6.1.1.2Traffic-movement control shall manage movement of traffic on highways.
1.6.1.1.3Traffic-movement control shall include the goal of minimizing delay times.
1.6.1.1.4Traffic-movement control shall include the goal of minimizing energy use.
1.6.1.1.5Traffic-movement control shall include the goal of minimizing air quality impacts due to traffic.
1.6.1.2Traffic Flow Optimization shall include a wide area optimization capability, to include several jurisdictions.
1.6.1.2.1Wide area optimization shall integrate the control of network signal systems with the control of freeways.
1.6.1.2.2Wide area optimization shall include features that provide preferential treatment for transit vehicles.
1.6.1.2.3Wide area optimization shall include features that provide preferential treatment for HOV.
1.6.1.3Traffic Flow Optimization shall be implemented in a manner that seeks to optimize traffic movement over a large geographic area.
1.6.1.4Traffic Flow Optimization shall include a Control function that is responsive to both the current demand as well as the expected demand.
1.6.1.4.1The Control function shall include the capability to facilitate the dissipation of traffic congestion.
1.6.1.5Traffic Flow Optimization shall provide the capability to predict travel patterns.
1.6.1.6The Control function shall include the use of data acquired from traffic surveillance as feedback to the control strategies.
1.6.1.7Implementation 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.
1.6.2TC shall include a Traffic Surveillance function.
1.6.3TC shall include a Device Control function.
1.6.3.1The Device Control function shall include a "real-time" traffic-adaptive control capability.
1.6.3.2The real-time traffic-adaptive control portion of the Device Control function shall be an area wide control to include several jurisdictions.
1.6.3.2.1The area wide control shall be implemented in an integrated and consistent manner that avoids the issuance of conflicting controls.
1.6.3.2.2(a)Transit.
1.6.3.3The Device Control function shall provide the capability to exercise control over those devices utilized for traffic control.
1.6.3.3.1Device Control shall include the capability to control traffic signalization, including rapid modification of signalization parameters to respond to traffic requirements.
1.6.3.3.2Device Control shall include the capability to dynamically control traffic signing.
1.6.3.3.3Device Control shall include the capability to control freeway ramp metering.
1.6.3.3.4Device Control shall include the capability to exercise dynamic control over the infrastructure (such as reversible-lanes, turning restrictions, etc.).
1.6.3.4Device Control shall communicate control data to the following devices.
1.6.3.4(e)Human operator support.
1.6.3.4.1Traffic Surveillance shall include a data process function to process the traffic data which are acquired.
5.0EMERGENCY MANAGEMENT
5.2EMERGENCY VEHICLE MANAGEMENT
5.2.3EVM Service shall include a Signal Priority System.
5.2.3.1Signal Priority System shall maintain real-time information on signal timing, emergency vehicle locations and emergency vehicle routing.
5.2.3.2Signal Priority System shall determine signal prioritize timing sequences for relevant signals.
  
The detailed process and user service requirement traceability information on this page was extracted from the National ITS Architecture. Consult the National ITS Architecture web site for more information.

Last updated on 01-22-2003 using Ronald C. Ice and Associates Web Spinner Technology.