#50 Standard speed sign dimensions in Victoria
- Duc Phan
- Dec 8
- 2 min read
Updated: Dec 8
In Victoria, the Road Safety (Traffic Management) Regulations prescribe requirements for the authorisation of traffic control devices, including speed limit signs.
Speed limit sign sizes are categorised by codes ranging from A (smallest) to E (largest). Selection of the appropriate sign size is determined by the applicable speed zone, where sign sizes generally increase with speed limits. Various environmental and traffic conditions may warrant variations, such as, for example, use of a smaller sign than would otherwise be used in situations where sight lines may be obscured or space is limited (e.g., in tunnels).
The Victorian Speed Zoning Technical Guidelines Version 3.0 (2025)[1] sets out the following sizes for speed limit signs in Victoria, where only the speed limit is shown. For signs that show the speed limit and additional information, the signs must necessarily be larger, although the diameter of the regulatory speed limit circle remains the same.
| Size category | |||
A | B | C | D | |
Width (mm) | 450 | 600 | 900 | 1200 |
Height (mm) | 600 | 800 | 1200 | 1600 |
Standard use case | City Places City Streets and Hubs Local Streets Local Roads Peri-urban roads Activity Streets and Boulevards (<= 40km/h) - Repeater sign with no time of operation info. Shared zones. | All road/place types, except Freeway/Motorway/Tollway - first instance | All road/place types, except Freeway/Motorway/Tollway where speed reduction is 30km/h or more.
All Freeway/Motorway/Tollway applications | Freeway/Motorway/Tollway applications where 110km/h limit ends and a new limit begins |
Example exceptions | May replace B sign where use is constrained | May be replaced by A sign where use of B is constrained | May replace B in school zones to increase conspicuity |
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For electronic speed limit (ESL) signs, Austroads[2] recommends that road agencies adopt the static sign size and design specifications.
[2] Austroads (2019), Guide to Traffic Management Part 10: Traffic Control and Communication Devices.
