Equipped with a world-class interceptor vehicle, the city police caught over 300 persons for over-speeding on the highly accident-prone Chennai-Kolkata highway during April. The new generation vehicle, equipped with a speed hunter, breath analyzer and pan-tilt-zoom (PTZ) model of closed circuit TV camera, helped the police nab the violators with video proof. A sum of Rs 1.03 lakh was collected as penalty, City Traffic Police DSP J. Ram Babu said. He warned that the fine would be compounded for repeated violations.