Temporary traffic management
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Get up to date information about the Temporary Traffic Management transition and receive updates from the Department of Logistics and Infrastructure.
Temporary traffic management (TTM) is the safe management of traffic:
- through, past, and around sites where work is happening on a road
- where an event is being held.
The NT Government (NTG) is responsible for the management of the NTG road network.
Protecting workers and road users
Australian Standards apply to traffic management, including the appropriate use of:
- road signs
- portable traffic signals
- other devices.
This ensures the protection of all road users, including:
- workers
- motorists
- pedestrians
- cyclists
- emergency or service vehicles.
How we do this
To be successful, TTM requires the following:
- thorough planning
- safe and consistent traffic management practices and implementation
- ongoing monitoring and reviewing of worksites, procedures and documentation.
Austroads Guide to Temporary Traffic Management
The Austroads Guide to Temporary Traffic Management (AGTTM) was adopted on 1 July 2023 by the Department of Logistics and Infrastructure (DLI).
Austroads is responsible for updates to the AGTTM. To find out more, go to the Austroads website.
Variations have been added to the AGTTM to allow for NT road conditions including road trains and the 130km/h speed zone. A summary of the variations is outlined below.
Estimated queue lengths
The following variation was added to the AGTTM to allow for road trains.
| Maximum stopping time (minutes) | Multiplier average vehicle (Ma) | Multiplier oversized vehicles (Mo) | Multiplier road trains (Mr) |
|---|---|---|---|
| 2 | 2.4 | 8 | 25.2 |
| 5 | 6 | 20 | 63 |
| 10 | 12 | 40 | 126 |
| 15 | 18 | 60 | 189 |
| 30* | 36 | 120 | 378 |
*A 30 minute stop time is unusual but is included for some cases.
To estimate the queue length (with provision for the road trains multiplier):
- Count the number of average vehicles, oversized vehicles and road trains that pass the PTCD/traffic controller position for 5 minutes.
- Multiply the number of vehicles counted by the number in the chosen ‘multiplier’ column using the maximum stop time required at the specific worksite.
- Use the formula below to calculate the estimated queue length:
- (number of average vehicles x Ma) + (number of oversized vehicles x Mo) + (number of road trains x Mr)
= queue length.
- (number of average vehicles x Ma) + (number of oversized vehicles x Mo) + (number of road trains x Mr)
Length of temporary speed zone
The length of the temporary speed zone depends on the temporary speed limit.
The table below is an NT-specific modification to the 'length of temporary speed zones' table within part 3 of the AGTTM.
It includes a minimum speed buffer when undertaking a reduction from the 130km/h speed limit.
When a 100 buffer is installed, the 80 buffer 300m (minimum) does not apply as the 100 buffer provides the required minimum length of zone.
| Temporary speed limit (km/h) | Length of zone (m) | Conditions |
|---|---|---|
| 100 (buffer) | 300 (minimum) | For advance warning of a 40km/h, 60km/h, or 80km/h, when speed is reduced from 130 km/h. |
Note: the 80 (buffer) – 300 (minimum) length of zone does not apply.
Method for reducing speed limit for 130km/h
The following NT variation was added to the AGTTM to allow for regulatory speed reductions for 130km/h zones.
| Speed limit reduction | Method for reducing speed limit | Recommended applications | Alternative applications |
|---|---|---|---|
| 90 | Speed limit signs and/or speed limit AHEAD | 130 – 100 – 80 – 60 – 40 130 – 100 – 80 – 60 - 40 AHEAD – 40 | 130 – 100 – 80 AHEAD – 80 – 60 - 40 |
| 80 | Speed limit signs and/or speed limit AHEAD | 130 – 100 – 80 – 50 130 – 100 – 80 – 50 AHEAD - 50 | 130 – 100 – 80 AHEAD – 80 - 50 |
| 70 | Speed limit signs and/or speed limit AHEAD | 130 – 100 – 80 – 60 130 – 100 – 80 - 60 AHEAD – 60 | 130 – 100 – 80 AHEAD – 80 – 60 |
| 50 | Speed limit signs and/or speed limit AHEAD | 130 – 100 – 80 | 130 – 100 – 80 AHEAD - 80 |
Truck mounted attenuator (TMA)
These are recommended but not mandatory.
Multi-message signs (MMS)
MMS are currently approved for use in the following environments:
- where the posted speed limit is 80km/h or less, and there are no more than 2 lanes of traffic in one direction
- within worksites where the posted speed limit is higher than 80km/h but the temporary speed limit is lower than 65km/h, and there are no more than 2 lanes of traffic in one direction.
Temporary traffic management device and approval
Find out how to apply for new temporary traffic management device approval.
NT road categories
Road categories are assigned to each road on the network. At this stage, the Territory does not have any category 3 roads.
If you work on the NTG road network, read the below table.
The category of the road will determine the level of:
- individual training
- company accreditation.
Read the table below to find out more about the changes.
To find out more, read part 8: processes and procedures of the Guide to Temporary Traffic Management on the Austroads website.
Training and certification
To work on NT Government managed roads, you must successfully complete relevant training and certification.
Contact
To find out more, contact:
Department of Logistics and Infrastructure
Level 2 Highway House
14 Palmerston Circuit
Palmerston NT 0830
roadsdarwin.ntg@nt.gov.au
PO Box 61
Palmerston NT 0831
Phone: 08 8999 4449
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