System for automatic vehicle spot-speed measurement and detection of speed limit violations in a given location. The system consists of a stationary speed camera and an interface device that serves as a data analyzer (Automatic Number Plate Recognition – ANPR), protocol converter, and enables communication with the central system. The system operates autonomously in a 24/7 mode, and the evidence of violations captured by it is encrypted, digitally signed, and promptly transmitted to the central system.