You may not hear a train as it approaches
At a railroad crossing, do not assume that you will hear an approaching train. Trains may be prohibited from sounding their horns in certain areas, or the sound of its horn may be covered by noise from your vehicle. Do not assume that warning lights or other signals will announce a train.
B You should expect to hear any approaching train
C You will hear two short blasts of the train's horn
D There will always be flashing warning lights