/** Handles train car insertion */
public static void runI() {
System.out.println("Enter car length in meters: ");
double l = input.nextDouble();
System.out.println("Enter car weight in tons: ");
double w = input.nextDouble();
list.insert(new TrainCar(l, w, new ProductLoad()));
System.out.println("New train car " + l + "meters and " + w + "tons inserted into train.");
}
