Architecture

Software

The unique software architecture of STREAMS supports a comprehensive range of services and infrastructure making it possible to run numerous traffic services in a single, integrated system.

STREAMS integrates:

  • Managed Motorways
  • STREAMS Incident Management System (SIMS)
  • Urban Traffic Control
  • Parking Guidance
  • Real time traveller information
  • Business Intelligence
  • Network Video Management
  • System interfaces (including STREAMS Arterial Management - interface to SCATS®)

Each STREAMS feature relates to a separate traffic management task or group of tasks. The grouping is intuitive and the features include everything you will need to perform the related task. Each service can operate with or independently of others.

There are significant benefits to using the integrated STREAMS ITS Platform including:

  • Synergy between existing systems and equipment – no vendor lock-in
  • Modular, scalable architecture facilitating streamlined migrations and system upgrades
  • Optimised road network performance through a single user interface
  • Cost savings through easy to enter policies and third party interfaces
  • Secure, flexible data communications
  • Reduced training and resourcing costs associated with a single ITS platform
  • Efficient data management.

The modularity of the STREAMS platform lets you build an individual system from scalable, flexible and secure components.

Benefits include:

  • Software services modules are separable so you can upgrade modules without change to others.
  • Ability to ‘plug in’ alternative algorithms as and when they are required, even during run time.
  • Ability to incorporate new technology standards as they evolve, with minimal effort.
  • Systems can start with a single application, or as many as a customer requires.
  • Adding and removing applications is a simple process.
  • Systems can scale from small towns to large regions.
  • It is easy to interface STREAMS with existing and legacy systems, giving customers the control to manage systems development.

 

Hardware

The hardware architecture is distributed and PC based. The STREAMS ITS Platform comprises a central server, user workstations and field processors for controlling roadside devices. The server runs Microsoft Windows Server, the workstations run Microsoft Windows, and the Field Processors (Industrial PCs) use Linux. Each component is described below.

 

Network

STREAMS requires certain network services, such as DNS and NTP to be available on the ITS network, and minimum bandwidth and latency requirements must be met. Transmax does not specify the network hardware architecture required to run STREAMS. Transmax will specify further details for particular applications.

More information

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Component Purpose
Application Server The Application Server provides core processing logic within the system. All STREAMS Workstations and Field Processors communicate directly with the Application Server using Internet Protocol (IP) based networks. To secure these connections, STREAMS uses certificate-based authentication and Secure Socket Layer (SSL) security.
Field Processor The STREAMS Field Processor is a ruggedised computer designed for use in a suitable roadside enclosure. Transmax designed the Field Processor as part of the STREAMS system to provide local processing and control of field devices. It increases system reliability, reduces required bandwidth and allows the system to act intelligently during WAN outages. Please refer to section 7 for more information about Field Processor deployment.
Workstation Workstation The Workstation is the STREAMS front-end. It provides users with a feature rich Graphical User Interface (GUI) to access the STREAMS system.
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