Abstract: An alert system for monitoring at least one incursion into a safe stopping distance of a primary vehicle, the alert system including at least one forward facing sensor mounted relative to the primary vehicle to capture data, at least one image capture device mounted relative to the primary vehicle, at least one alert device associated with the primary vehicle, and a calculation engine to calculate a minimum safe stopping distance for the primary vehicle based on a real time speed of the vehicle and a vehicle weight, and to calculate a separation distance to a third party vehicle to be calculated relative to the primary vehicle based on the data captured by the at least one forward facing sensor, wherein the calculation engine compares the minimum safe stopping distance at any time to the separation distance to the third party vehicle to establish if the third party vehicle is within the minimum safe stopping distance of the primary vehicle, and if the third party vehicle is within the minimum safe stopping di