What should you do if you have a green light, but a car from the opposite direction runs a red light?

• Be ready to stop to avoid a collision
  Explanation:

  "When a driver fails to stop at a red light, others with a green light should not insist on the right of way. Motorists should be alert to possible lawbreakers and prepare to stop to avoid a collision."
• Insist on your right of way and continue through the intersection
• Honk your horn to alert the other driver
• Ignore the situation and proceed