After the driver has traveled 2000 feet down the road, a group of barriers will be displayed 1000 feet in front ofthe them (2000, Barriers, 1000). The next 2 parameters specify the lateral positions for the front and rear of thebarrier respectively. Since these parameters are set to 0 {0} and 12 {0}, the beginning of the barrier will start atthe roadway’s dividing line and the end of the barrier will be 12 feet to the right of the dividing line. The length ofthe barrier is set to 500 feet; therefore this event will gradually block the right lane closest to the dividing lineover a distance of 500 feet. The height of the barriers is 3 feet because the model specified with the finalparameter is set to 1 and model 1’s height is roughly 3 feet.