
    Write a function that analyzes traffic flow data from multiple intersections and identifies the intersection ID with the lowest congestion level. The input consists of intersection data pairs where each pair contains an intersection ID and its current traffic congestion measurement in vehicles per minute. Return the intersection ID that corresponds to the lowest measured congestion value.
    

    
from operator import itemgetter

def index_minimum(test_list):
    """
    Write a function that analyzes traffic flow data from multiple intersections and identifies the intersection ID with the lowest congestion level. The input consists of intersection data pairs where each pair contains an intersection ID and its current traffic congestion measurement in vehicles per minute. Return the intersection ID that corresponds to the lowest measured congestion value.
    

    """
from operator import itemgetter

def index_minimum(test_list):
    """
    Write a function that analyzes traffic flow data from multiple intersections and identifies the intersection ID with the lowest congestion level. The input consists of intersection data pairs where each pair contains an intersection ID and its current traffic congestion measurement in vehicles per minute. Return the intersection ID that corresponds to the lowest measured congestion value.
    

    """
    res = min(test_list, key=itemgetter(1))[0]
    return res