Published by Australian Academy of Science
Useful sites | A fair cop! Accurate breath analysis and speed detection

National Measurement Institute (Australia)

• How Australia's measurement system works
  An overview of the basis of measurement in Australia.
  http://www.measurement.gov.au/index.cfm?event=object.showContent&objectID=C3CDFE95-BCD6-81AC-124CE10A492450C2
  
• Significant achievements and the history of measurement in Australia
  Includes a timeline and links to more specific topics (eg. Redefinition of the metre).
  http://www.measurement.gov.au/index.cfm?event=object.showContent&objectID=C4E7F12C-BCD6-81AC-1F733492AF7B3121
  

Breath alcohol testing basics – Why breath alcohol analysis? (CMI, Inc, USA)

Briefly explains why measuring breath alcohol levels is a way of determining blood alcohol levels.
http://www.alcoholtest.com/whybaa.htm

Evidential breath analysis in New South Wales: an exercise in pragmatism (Schaffer Library of Drug Policy, USA)

Covers the effect of blood alcohol levels on driving skills and explains how the results of breath tests can be used in court.
http://www.druglibrary.org/schaffer/Misc/driving/s5p5.htm

The history and development of speed camera use (Monash University Accident Research Centre, Australia)

A report that examines the controversies experienced in Australia, USA and UK in the history of speed cameras.
http://www.monash.edu.au/muarc/reports/muarc242.html

How Stuff Works (USA)

• How radar works
  Explains echo and Doppler shift and how radar uses these two phenomena.
  http://www.howstuffworks.com/radar.htm

• How does a laser speed gun work to measure a car's speed?
  A non-technical explanation.
  http://www.howstuffworks.com/question396.htm