The video shows the working demo of Line Following Robot with obstacle avoidance (Lejos NXT) developed by Arif Ali Ap, Zinabu Haile and Prayag Surendran at IIT Guwahati
The robot has to traverse an arena to reach a destination area. The destination lies towards the southern region of the arena. There is a path in the arena which leads to the destination. The path is black in colour over a white surface. This path ends in a red coloured region which is the destination. The trajectory of this path is variable (such as straight, zig-zag, circular etc.). There are obstacles of different shapes and sizes along the path. While traversing, the robot has to avoid any collision with those obstacles and keep following the path. If a yellow coloured strip is found on the path by the robot that would mean there is a junction point ahead wherein two or more paths diverge. The robot has to decide which way to go to reach the destination.