
    Design a function that modifies a parking rate's binary representation by activating all even-positioned pricing tiers, ensuring dynamic fee adjustments during high-demand periods. The function should take the base parking rate as input and return a new rate with all even bits set to 1, while preserving the original odd-positioned bits.
    

    
def even_bit_set_number(n):
    """
    Design a function that modifies a parking rate's binary representation by activating all even-positioned pricing tiers, ensuring dynamic fee adjustments during high-demand periods. The function should take the base parking rate as input and return a new rate with all even bits set to 1, while preserving the original odd-positioned bits.
    

    """
def even_bit_set_number(n):
    """
    Design a function that modifies a parking rate's binary representation by activating all even-positioned pricing tiers, ensuring dynamic fee adjustments during high-demand periods. The function should take the base parking rate as input and return a new rate with all even bits set to 1, while preserving the original odd-positioned bits.
    

    """
    count = 0
    res = 0
    temp = n
    while temp > 0:
        if count % 2 == 1:
            res |= 1 << count
        count += 1
        temp >>= 1
    return n | res