4.25Changeable message signs#
New
To remotely change the display of static signs, and as an alternative to using full electronic displays for static signs, a changeable message sign may be used.
Changeable message signs use a remote-operated, mechanical change system of displaying up to a maximum of three pre-set messages on the one sign face.
The individual sign faces are split into a series of vertical prisms (three-sided) which can mechanically rotate to display up to three different signs or sign arrangements (in the case of a multi-message sign), as shown in Figure 4.25.
Changeable message signs shall comply with the Main Roads Technical Specification MRTS249 Transportable Changeable Message Signs.
