
    Calculate the total distance a delivery vehicle must travel to completely circumnavigate a square city block during peak traffic hours, given the block's side length in meters. The calculated perimeter will help dispatchers determine optimal alternative routes when the primary path is congested.
    

    
def square_perimeter(a):
    """
    Calculate the total distance a delivery vehicle must travel to completely circumnavigate a square city block during peak traffic hours, given the block's side length in meters. The calculated perimeter will help dispatchers determine optimal alternative routes when the primary path is congested.
    

    """
def square_perimeter(a):
    """
    Calculate the total distance a delivery vehicle must travel to completely circumnavigate a square city block during peak traffic hours, given the block's side length in meters. The calculated perimeter will help dispatchers determine optimal alternative routes when the primary path is congested.
    

    """
    perimeter = 4 * a
    return perimeter