Due to the latest RF hardware, ultra-high definition (UHD) angular resolution techniques and improved tracking algorithms, the sensor performance proved to be robust, with a counting accuracy of up to 99% despite the general challenges of tunnel detection for radar, like reflections on tunnel walls! And the best part is: smartmicro sensors are maintenance-free, means you do not have to close down roads and disrupt traffic repeatedly in order to perform service. See the impressive performance in the video.