
    Calculate the total distance maintenance workers must walk to complete a full inspection around a transit vehicle, where they need to traverse the perimeter of a square-shaped safety zone with a standardized side length in meters. The inspection path must cover all four sides of the safety zone to ensure comprehensive vehicle assessment.
    

    
def square_perimeter(a):
    """
    Calculate the total distance maintenance workers must walk to complete a full inspection around a transit vehicle, where they need to traverse the perimeter of a square-shaped safety zone with a standardized side length in meters. The inspection path must cover all four sides of the safety zone to ensure comprehensive vehicle assessment.
    

    """
def square_perimeter(a):
    """
    Calculate the total distance maintenance workers must walk to complete a full inspection around a transit vehicle, where they need to traverse the perimeter of a square-shaped safety zone with a standardized side length in meters. The inspection path must cover all four sides of the safety zone to ensure comprehensive vehicle assessment.
    

    """
    perimeter = 4 * a
    return perimeter