Problem/Opportunity:

Traffic Management (and associated signage) is a core safeguard for the public and work teams (Main Roads and Contractors).

The current signs currently seem to blow down very frequently and so the idea is focused on how can the signs be made more stable and resist being blown over by wind gusts and passing vehicles, such as quad road trains.

Objectives:

The objective of the study is to identify a more stable system with minimal or no change to current equipment used by many Traffic Control companies.

Currently a variety of systems are used: such as sand bags, rubber weights, etc. but still the signs seem to blow down.  Some companies supply swing-type stands but their effectiveness has not been assessed.  Some companies may have good ideas which could be shared across the industry.  The most common signage is similar to this:

Approach and Scope of Works:

The preferred solution would be to utilise the currently used frame above so that that companies don’t have to replace their equipment.  The research would include desktop research of other solutions available globally and the design and testing of various alternative stabilisation measures.  Some of the constraints include: must be small, must be light weight so as to be easily manoeuvrable by work crews (including women), must cater for steep slopes / batters on road edges, must cater for different road shoulder materials including very hard earth (such as in the Pilbara) and must not be too rigid in case a vehicle collides with them.  There are many signs currently in use by Traffic Control organisations that use the square cross section frame and legs (similar to that shown in the photo included above) and must conform to AS 1742. If an improvement to AS 1742 is considered necessary to enable the preferred solution, this should be recommended as part of the overall study.

Benefits to Main Roads:

Signs will stay up when the traffic management crews have installed them:

  • Traffic Controllers will not have to keep going back to put the signs back up
  • Traffic Controllers are not subject to hazards more often than necessary
  • Signage staying in place is better for the safety of the public using the road network
  • Road workers are protected from speeding motorists unaware of the lower speed limit