1Introduction#
This Technical Specification defines the design, functionality and documentation requirements for Transportable Changeable Message Sign (TCMS) and their associated devices. TCMS covered by this Technical Specification are only temporary traffic management signage for use as part of an approved Traffic Guidance Scheme for roadworks or construction projects adjacent to roads.
A TCMS defined in this Technical Specification is used for temporary traffic management and/or driver information for the purpose of improving the safety of workers and the safe and efficient movement of road users at a work site. A TCMS uses on-site operated, mechanical change system of displaying up to a maximum of three different pre-set messages on the sign using a triangular prism mechanism.
The key differences between a CMS sign covered under MRTS227 Changeable Message Signs and a TCMS covered under this Technical Specification are that:
- a) TCMS is a system for the display of temporary traffic management signs
- b) TCMS operation is through the use of a handheld short range device (HHD). A TCMS shall not be remotely controlled from off-site. An optional off-site remote sign monitoring system may be provided.
- c) TCMS are battery powered and, where desired, the batteries are recharged via solar panels, and
- d) TCMS can be pole-mounted, mounted on a vehicle or trailer so that they can be relocated when required for traffic control staging.
TCMS complying with this Technical Specification shall only be used to display temporary traffic management signs in accordance with the operational requirements of the Queensland Guide to Temporary Traffic Management (QGTTM) and Austroads Guide to Temporary Traffic Management (AGTTM) and Queensland Manual of Uniform Traffic Control Devices (Queensland MUTCD) Part 3 and AS 1742.3.
All TCMS used in safety related applications shall only be deployed following the appropriate risk analysis undertaken to ensure safety in the event of sign failure.
This Technical Specification shall be read in conjunction with MRTS01 Introduction to Technical Specifications, MRTS50 Specific Quality System Requirements, MRTS201 General Equipment Requirements, MRTS227 Changeable Message Signs, the Queensland Guide to Traffic Management Part 10 Transport Control – Types of Devices and other Technical Specifications as appropriate.
This Technical Specification forms part of the Transport and Main Roads Specifications Manual.