How fast would you have to be travelling for a speed camera to be ineffective?

When you whiz through a speed camera, a speed sensor which works on the doppler principle logs your speed, and activates the circuits or mechanism to snap a picture of your car as it passes through the focal range of the camera.

Now, presumably, if you crank up your speed high enough, you would be able to escape out of the cameras field of view or focal range before the camera got activated.

But what speed would be required to acchieve this?

And would it be possible to travel so fast that the speed detector mechanism doesn't even notice you because you've passed it by before it even had a chance to register your existence?

What is a VPN?

VPN is (Virtual Private Network) were first used by companies to enable their employees to securely access internal systems such as email remotely (e.g. from home or while on business trips). Today they are increasingly being used for personal use by individuals to protect their privacy while online in public places (e.g. when using the wi-fi connection in a cafe) or in a country where the internet is censored / blocked (e.g. China, Saudi Arabia…).