Here's some information about these cameras:
They are made by a Dutch company, Gatsometer BV.
If you slow down before it then of course it won't get you.
If there is a camera in the box, there will usually be a white reflector-type circle in the bottom window (normal cameras only, red circle in infra-red ones). If both holes appear black, then it is likely the box is empty.
In theory there can still be a flash even if the camera has been removed
Many cameras still use rolls of film and these are limited to 360 exposures. The cameras flash twice for every car (Unless there are two in quick succession, when they may flash three times). It depends how often the film is replaced. If you are lucky, the camera will be out of film, especially in a busy area.
They are accurate up to 100 km/h, the margin of error is 2 km/h maximum, above that, 2% of the registered speed - well within the legal margin of error. They are also tested for resilience under all weather conditions: up to 95% relative humidity, and from 15° below zero to 60° above, 24 hours a day, 365 days a year. The cameras are also equipped with a timer, so that operating times can be limited: to rush hour only for example.
Here's some information about these cameras:
They are made by a Dutch company, Gatsometer BV.
If you slow down before it then of course it won't get you.
If there is a camera in the box, there will usually be a white reflector-type circle in the bottom window (normal cameras only, red circle in infra-red ones). If both holes appear black, then it is likely the box is empty.
In theory there can still be a flash even if the camera has been removed
Many cameras still use rolls of film and these are limited to 360 exposures. The cameras flash twice for every car (Unless there are two in quick succession, when they may flash three times). It depends how often the film is replaced. If you are lucky, the camera will be out of film, especially in a busy area.
They are accurate up to 100 km/h, the margin of error is 2 km/h maximum, above that, 2% of the registered speed - well within the legal margin of error. They are also tested for resilience under all weather conditions: up to 95% relative humidity, and from 15° below zero to 60° above, 24 hours a day, 365 days a year. The cameras are also equipped with a timer, so that operating times can be limited: to rush hour only for example.