In addition to this, there is an antenna to catch GPS (global positioning system) signals from satellites and are combined with other readings to give out the accurate readings about positioning of a car.
There is always prior knowledge of routes attained from Google maps regarding a user want to go from a particular source to its destination. Alternative routes are also gathered from land and transport authority as they give regular feeds about road blockage, road under construction, weather change from climate reports, heavy traffic information etc.
All these information are gathered and an appropriate path selection is made before starting from its source point. The camera that is mounted at rear-view mirror is often used to detect objects as column blocks and other moving obstacles as well.
Lidar sensor is known as “light detection and ranging” [1].This is basically a technology based up on remotely sensing nearby area of a vehicle, covering up 360 degree ranging 0- 60 meters from the car. It produces high resolution images and calculates the distances from source to destination by measuring the time that it takes to reach. It can examine everything / sense its surroundings using ultraviolet, visible and infrared lights.
All the sensors and camera work together. If any one of the sensor gets affected the other fails to respond its functionality thus results in incorrect information. To avoid such problems, prior knowledge of routes is gathered from Google maps and land and transport authority. In case of road blockage, site underconstruction, weather change situations an alternate route is provided.