You are driving in stop-and-go traffic during the daytime, and someone in another vehicle tells you that your brake lights are not working. You should look for a service station, do all your braking very gently, and
Wave a red cloth or flag inside your vehicle, near your rearview mirror, whenever you apply your brakes.
Turn on your park lights whenever you apply your brakes.
Drive with your window open and use your hand signal when you slow down or stop.