GPS Detectors
Road Angel is generally the leader in the GPS Detector market these days, but the original concept was pioneered by Roadpilot. A GPS based speed camera detector is the best form of in-car technology and will protect you from 95% of the speed traps out there, while remaining completely inside the law and not subjecting you to a frustrating stream of false alerts and messages.
Speed Camera Locators
A GPS based detector updates your location every second using the Global Positioning Satellite system and compares your latitude and longitude coordinates with a database of fixed and mobile speed camera locations. When it notices that you're approaching one of these locations, an audible alert will be given to make you aware of it. You can then adjust your speed accordingly.
Download The Latest Information
These databases can be updated by downloading the latest speed camera locations over the internet, which generally requires a small subscription, but the more sophisticated units can provide you with a host of other information such as the speed limit at the camera locations as well as alerts for school locations, accident black-spots and congestion-charge zones for example.