Angular speed is defined as the rate at which an object changes its angle in radians or degrees over a given time period in seconds. In short, it is the scalar measure of rotation rate. It differs by linear speed as it travels in a circular path instead of linear path. It is represented by ω and is given as tan(distance/range)x180/Math.PI. You could make use of this online calculator to measure the angular speed of the vehicle travelling in a circular motion.