The assessment of road traffic noise in Queensland focuses on the loudest 10% of traffic movements that occur between the 18 hour period of 6am to 12 midnight - this is called the LA10 (18h) noise level. The LA10 (18h) does not consider the night time movements between 12am and 6am, nor does it capture single loud events (e.g. a loud motorcycle), unless of course there are lots of them − for example a large percentage of trucks.


Rail noise in Queensland is assessed through two methods. The first is by understanding the average noise level from all rail movements throughout the day. The second is the highest noise level made from a passing train. The average noise level has not been represented for the Toowoomba maps. The average noise level shifts considerably day by day, season by season with the number, type and length of the passing trains.

The Single Event Maximum (SEM) noise level has been mapped for Toowoomba ˘ defined as the average maximum noise level of the loudest movements per day. The SEM however does not consider train horns. The purpose of mapping the SEM is to help with sleep disturbance and annoyance.

Lots of factors influence the transmission of noise and the audibility of the train, regardless of the trains noise level, dependent on the surrounding noise sources. For example, a train clearly audible in a rural setting may not be at the same noise level, if the person listening is standing near a highway or a town / city centre.


The aircraft exposure map is a comparative map based on the number of flights recorded by Flightaware.com throughout the month of September 2016, their path and elevation. There is no guarantee that all flights have been captured by Flightaware.com. The type of aircraft has not been considered.

Data Sources

Sources for data to create this map include:
  • Buildings: Digitised from aerial photography
  • Terrain: Geoscience Australia
  • Road Source Lines − Information supplied by Toowoomba
  • Regional Council under copyright, and Department of Natural Resources and Mines
  • Traffic Volumes − Toowoomba Regional Council
  • Road Speeds − Open Street Map Posted Speeds
  • Rail Lines: Department of Natural Resources and Mines
  • Rail noise levels: Calculated form rail noise measurements
  • Flight movements: Flightware, spanning the month of September 2016.


The information on this map was derived from digital databases from publicly and commercially available sources. Care was taken in the creation of this map but Ambient makes no statements, representations or warranties about the accuracy, currency or completeness of any information in this map. All warranties, expressed or implied, are excluded to the maximum extent permissible by law. However, notification of any errors will be appreciated.

Ambient disclaims all liability to the maximum extent permissible by law for any loss, damage, expense and costs arising from any information in this map being inaccurate or incomplete in any way. Some of the data inputs used to create the map have been provided by the Toowoomba Regional Council (TRC). While every care is taken by the TRC to ensure the accuracy of this data, TRC makes no representations or warranties about its accuracy, reliability, completeness or suitability for any particular purpose and disclaim all responsibility and all liability whether in contract, negligence or otherwise for all expenses, losses, damages (including indirect or consequential damage) and costs which may be incurred as a result of data being inaccurate or incomplete in any way and for any reason. Based on data provided with the permission of TRC.

Ready to make better decisions with more data?

Talk to our team today.