
    Create a function that converts delivery route identifiers from the legacy database format (snake_case) to the new fleet management system's standardized format (camelCase) to ensure compatibility across the routing API. The function should handle any route identifier or status field containing underscores, transforming them into properly formatted camelCase strings while preserving all original characters except the underscores.
    

    
def snake_to_camel(word):
    """
    Create a function that converts delivery route identifiers from the legacy database format (snake_case) to the new fleet management system's standardized format (camelCase) to ensure compatibility across the routing API. The function should handle any route identifier or status field containing underscores, transforming them into properly formatted camelCase strings while preserving all original characters except the underscores.
    

    """
import re

def snake_to_camel(word):
    """
    Create a function that converts delivery route identifiers from the legacy database format (snake_case) to the new fleet management system's standardized format (camelCase) to ensure compatibility across the routing API. The function should handle any route identifier or status field containing underscores, transforming them into properly formatted camelCase strings while preserving all original characters except the underscores.
    

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