The piezo road strips (inductive loops) are a known distance apart, and the time between compressions is measured to give the resulting speed of the vehicle. The system takes a single photograph along with four readings on a two axle vehicle and uses the average time for compressions to calculate the resulting speed.
How do they help road safety?
They act as a deterrent, as they photograph the front of the car, you do not have time to slow down as you pass them – they may have already got you!
Read our News Stories for information and statistics on the impact Gatso cameras have on road safety.
They (Truvelo) Say:
“ Truvelo … clearly the way forward … is a subsidiary of Truvelo Manufacturers (Pty) Ltd in S Africa who have been involved in the design and manufacture of traffic related products for over 35 years.”
They appear slightly evil when you first discover them watching you from afar. As they use digital camera technology and pressure points under the road they do not give off any signal in use. It is still possible to get alerted to them, as the GPS devices will have them programmed in to their databases.