Department of State GrowthTransport

Traffic Surveys


Q: Why are traffic surveys done?

A: Like all state road agencies throughout Australia, the Department of State Growth uses a wide variety of techniques to routinely study traffic patterns.

The data gathered is used to determine the volume of traffic traveling through an area, the time it takes to get from one place to another, vehicle turning movements and the number of vehicles passing through sites.

With this information the Department can identify ways to improve road conditions that will help improve travel time reliability and make our roads safer.

Q: Are traffic surveys collecting my personal data?

A: No. No personally identifiable information is collected or retained by the Department in the course of these routine surveys.

Q: What methods do you use in your surveys?

A: Various methods are used to collect data, including hand counts, vehicle counter tubes on the road surface, and various other sensors that measure how long it takes to travel between two points.

Q: Can I find out where surveys are happening?

A: Every Monday we release the Roadworks Roundup, a list of all roadworks that may impact traffic throughout the state. Survey installations that may impact traffic are included in the Roundup.

Q: What do traffic survey sensors look like?

You may have seen our sensors around, or our technicians installing them.  Traffic tubes are usually black and lie across the road. Various other sensors are often contained in small boxes attached to traffic lights or on poles near the side of the road. If a hand count is being conducted, you may notice a technician with a small clicker at the side of the road.