Many intersections in downtown Ho Chi Minh City have become heavily congested due to reckless red- and yellow-light behaviors exhibited by road users, resulting in more serious traffic gridlock. Reckless red- and yellow-light behaviors are among the major causes of traffic accidents and traffic jams during rush hour in Ho Chi Minh City. Truong concluded that he should correct himself after following the crowd to run the yellow light that worsened the traffic congestion, even though he had not intended to accelerate through the yellow light. Reckless red- and yellow-light behaviors are among the major causes of traffic accidents and jams at rush hour, said a traffic police official in the southern metropolis. Both yellow and red light runners are subject to administrative fines as per the prevailing regulations, the official added.