
    Given a binary state representation of an urban intersection's traffic signals, write a function that activates the next available traffic control parameter by setting the leftmost inactive (0) bit to active (1). The function should maintain the existing active signals while optimizing traffic flow by enabling the highest-priority unused signal parameter.
    

    
def set_left_most_unset_bit(n):
    """
    Given a binary state representation of an urban intersection's traffic signals, write a function that activates the next available traffic control parameter by setting the leftmost inactive (0) bit to active (1). The function should maintain the existing active signals while optimizing traffic flow by enabling the highest-priority unused signal parameter.
    

    """
def set_left_most_unset_bit(n):
    """
    Given a binary state representation of an urban intersection's traffic signals, write a function that activates the next available traffic control parameter by setting the leftmost inactive (0) bit to active (1). The function should maintain the existing active signals while optimizing traffic flow by enabling the highest-priority unused signal parameter.
    

    """
    if not n & n + 1:
        return n
    (pos, temp, count) = (0, n, 0)
    while temp:
        if not temp & 1:
            pos = count
        count += 1
        temp >>= 1
    return n | 1 << pos