
    Write a function that converts bus route identifiers from the legacy snake_case format to the new standardized camelCase format in the transportation management system. The function should handle any valid snake_case string containing bus route parameters and convert it to its equivalent camelCase representation while preserving the original meaning of the identifier.
    

    
import re

def snake_to_camel(word):
    """
    Write a function that converts bus route identifiers from the legacy snake_case format to the new standardized camelCase format in the transportation management system. The function should handle any valid snake_case string containing bus route parameters and convert it to its equivalent camelCase representation while preserving the original meaning of the identifier.
    

    """
import re

def snake_to_camel(word):
    """
    Write a function that converts bus route identifiers from the legacy snake_case format to the new standardized camelCase format in the transportation management system. The function should handle any valid snake_case string containing bus route parameters and convert it to its equivalent camelCase representation while preserving the original meaning of the identifier.
    

    """
    return ''.join((x.capitalize() or '_' for x in word.split('_')))