Motorcycle Council of NSW Ph: 1300 679 622 (1300 NSW MCC) |


Let us assume that on a lovely sunny day you are driving/riding when you are pulled over by a police vehicle. The officer advises you that you were speeding which may or may not come as a surprise to you.

The first thing to bear in mind, is that if it is a highway patrol vehicle the conversation is being recorded both audio and video. Even if it is not a highway patrol vehicle the officer will make notes as to what responses you may have made in addition to potential bodycam. Often people are nervous and say things. It is sometimes safer not to make any admissions especially if you do not have all the facts and preferably not even then because doing so may seriously compromise your potential defence. For example, where exactly do they say they observed you speeding and how did they assess your speed. It can be the case that where you were alleged to be speeding is not where you have been pulled over by police, and you may not have been speeding at the point they say you were. For example, in the Southern highlands, I defended a case where upon viewing the ICV it was clear the bike passed the unmarked police car travelling in the opposite direction some 15 kilometres from where the rider was eventually pulled up and accordingly the rider had no idea what the officer was talking about.

Generally, there are four methods by which they assess speed (for the moment excluding fixed and mobile speed cameras) listed here in descending order of accuracy:

  1. The Lidar, which projects a laser beam and is aimed by the officer at an alleged specific target.
  2. The in-car radar which is a radar attached to the police car and operates by way of a Doppler beam,
  3. The check speed which is a police officer following you and assessing your speed by using their speedometer, which essentially shows their speed and may not be yours.
  4. Police officers’ estimate, which is based on the evidence a police officer, will give stating that in his/her opinion you were travelling at a certain speed. There is no objective measurement of your speed in this instance.

Often the police will use one of the first 3 methods combined with their estimate.


If one has the presence of mind, one should ask the officer, where specifically you are alleged to have been speeding and how they assessed your speed. It is beneficial for you to take photographs with your phone of where the incident is meant to have taken place and if you have the capacity on your sat nav or phone the exact longitude and latitude. It is often difficult especially on country roads to pinpoint the location weeks later when you see a lawyer and decide you want to challenge the allegation.

If the police officer was stationary when they alleged that they observed, you speeding try and observe from that vantage point what the officers visibility of your approaching vehicle would have been and the maximum sighting distance he would have had when he first observed your vehicle. Again, take photographs from that vantage point. Take notice of anything that may have obstructed the officer’s vision in tracking your vehicle.

Also try to assess from when the officer first observed you the following:

  1. What is the maximum sighting distance that the officer had from where he was standing or where his vehicle was parked.
  2. From the maximum distance how far had you travelled when he finished his test. The distance he would have had in observing you and conducting his test is relevant dependent upon the speed that is alleged and accordingly the available time he had to conduct his test. Distances will also enable the calculation as to the distance over time and therefore the potential speed.

Often, we roughly work out when the test is finished from when they step out onto the road or when they turn their lights on if facing you or if you get shown the speed and distance on the lidar. If they are mobile, we use either when they turn their lights on as they are approaching or at the worst the cross over point that is the point at which they go past you and they should no longer be getting a return from your vehicle.

In my next post I will cover the check speed and estimate in more detail in relation to speeding charges.

The article as written is for your information and interest only and is based on New South Wales law only. It is not intended to be comprehensive, and does not constitute and must not be relied on as legal advice. Please be aware that every case is different and the matters I am raising may not be of specific relevance to your situation but may have a general application and you must seek specific advice tailored to your circumstances. I will also gladly talk to anyone on the phone if confused or want clarification.

Chris Kalpage
Kalpage and Co Solicitors

For Chris’ contact details, see his website Kalpage & Co or email Chris directly