
    Write a function to validate if a traffic signal timing pattern name follows the standardized format where sequences of lowercase letters are connected by underscores (e.g., "morning_peak_pattern"). The function should return true if the pattern name is properly formatted and false otherwise, ensuring consistent naming conventions across the traffic management system.
    

    
import re

def text_lowercase_underscore(text):
    """
    Write a function to validate if a traffic signal timing pattern name follows the standardized format where sequences of lowercase letters are connected by underscores (e.g., "morning_peak_pattern"). The function should return true if the pattern name is properly formatted and false otherwise, ensuring consistent naming conventions across the traffic management system.
    

    """
import re

def text_lowercase_underscore(text):
    """
    Write a function to validate if a traffic signal timing pattern name follows the standardized format where sequences of lowercase letters are connected by underscores (e.g., "morning_peak_pattern"). The function should return true if the pattern name is properly formatted and false otherwise, ensuring consistent naming conventions across the traffic management system.
    

    """
    patterns = '^[a-z]+_[a-z]+$'
    if re.search(patterns, text):
        return True
    else:
        return False