8Operational requirements#

8.1Environmental conditions#

The equipment shall be capable of continuous, normal operation in the conditions described below:

  • installed directly in sunlight
  • ambient air temperature range between - 5°C and 50°C
  • enclosure air temperature Refer Clause 13.9 and Appendix B Clause 5
  • ambient ground temperature not exceeding 40°C
  • a range of temperature and humidity prescribed in AS 2578 (Withdrawn)
  • maximum wind conditions likely to occur at the installation Site
  • Queensland coastal environment with salt deposit densities in the range of 2.0 to 3.0 g/m²
  • varied light intensity due to shadows
  • a humidity of up to 95% non-condensing
  • conditions, both permanent and temporary, that may be unique to the specified location, for example instances of thick smoke and electromagnetic interference, and
  • vibrations reasonably expected in the installed location

The equipment performance shall be unaffected by a humidity of 90% combined with an ambient air temperature of 40°C followed by a sudden drop in temperature of up to 10°C.

Equipment operation shall cause no adverse effect on the surrounding environment in which it is installed. Likewise, equipment shall not be affected by adverse environmental conditions expected at the intended installation location.

8.2Performance and availability#

Unless otherwise specified, equipment designed for measurement or data collection shall operate with at least 95% accuracy. For other types of equipment, performance shall meet the functional requirements specified in the relevant Technical Specification.

Equipment and/or systems, that do not have a designated Safety Integrity Level (SIL) under AS 61508, shall have an operational availability of at least 99% excluding downtime caused by to mains power outages or failures in the Principals’ telecommunications network.

Failures shall be rectified in accordance with Clause 4.3 and Clause 19.

Equipment and/or systems that have a designated SIL rating shall have an operational availability that is consistent with its respective Safety Requirements Specification.

8.3Failure modes#

The equipment and/or associated system(s) shall:

  • where specified, enter or display a default mode during power, operational and/or telecommunications failure
  • automatically shut down in a safe manner upon power, operational and/or telecommunications failure, and
  • automatically restart in a safe manner upon restoration of power supply, operation and/or telecommunications.

8.4Security#

8.4.1Scope of products#

The requirements outlined in this clause apply to all ITS device and/or system connected to the Principals’ telecommunication network and that process, store, or transmit privacy-related data. These devices and systems shall be developed in accordance with IEC TR 62443: Industrial communication networks – Network and system security management systems.

8.4.2Organisational information security management system (ISMS)#

Suppliers are required to maintain an organisational Information Security Management System (ISMS) aligned to ISO 27001. This ISMS must include preventative, detective, and response controls, supported by an ongoing risk-based assurance programme across people, processes, and technology.

8.4.3Security control objectives#

Suppliers shall:

  • Implement and validate a robust security development lifecycle.
  • Provide control system products that meet the defined security level capabilities required by the Principal, based on applicable industry standards.
  • Ensure components meet and can be demonstrated to meet the required security level capabilities where specified in the specific Technical Specification, and
  • Provide ongoing lifecycle support for control systems and component products.

8.4.4Standards-based approach#

Suppliers shall adopt a standards-based approach to protect ITS assets, in alignment with IEC 62443. This includes:

  • Applying security levels proportionally based on functional impact to protect Intelligent Transport Operational Technology assets, with safety and safe outcomes prioritised within Transport and Main Roads risk appetite.
  • Implementing security controls in accordance with IEC 62443, where specified in specific Technical Specification.

8.5Functional safety#

The design, manufacture, testing, commissioning, certification and operation of all Devices and/or Systems shall comply with requirements described in AS 61508.0 for the respective Safety Integrity Level (SIL), specified and/or agreed by the Principal. Unless otherwise specified in the Safety Requirements Specifications, all materials, equipment and work activities forming part of an ITS device and/or system shall meet the SIL for that device and/or system. In accordance with Clause 7.1 above, all materials and/or equipment shall meet the highest SIL for similar Devices and/or Systems provided under this Contract. The Contractor shall certify that the Device and/or the System satisfies the respective SIL rating. The 'Proven Use' method of certification described in AS 61508.0 may only be used where the Contractor can provide comprehensive documentary evidence of all operating / fault / maintenance history of the same device and/or system to be provided under this Contract. Similar to the requirements of Clauses 4.2.1and 4.2.2, certification shall be provided for each variant of a device and/or system. In interpreting AS 61508.0, 'should' shall be read as 'shall'. Where AS 61508.0 allows for relaxations / exemptions of the standard, such relaxations / exemptions are not permitted.

Source: MRTS201 · pages 18–20 Open PDF at this page Search this document