
    Write a function that standardizes bus route identifiers by removing characters at odd positions to improve display clarity on digital transit boards. The function should take a route identifier string as input and return a modified string with characters at odd indices removed, helping maintain consistent route code formatting across the transit system.
    

    
def odd_values_string(str):
    """
    Write a function that standardizes bus route identifiers by removing characters at odd positions to improve display clarity on digital transit boards. The function should take a route identifier string as input and return a modified string with characters at odd indices removed, helping maintain consistent route code formatting across the transit system.
    

    """
def odd_values_string(str):
    """
    Write a function that standardizes bus route identifiers by removing characters at odd positions to improve display clarity on digital transit boards. The function should take a route identifier string as input and return a modified string with characters at odd indices removed, helping maintain consistent route code formatting across the transit system.
    

    """
    result = ''
    for i in range(len(str)):
        if i % 2 == 0:
            result = result + str[i]
    return result