What does a flashing red and green light signify?

A flashing red and green light signifies the need for extreme caution. This type of signal is typically used in certain contexts, such as at airfields or specific vehicular crossing areas, where it serves as a warning that there may be potential hazards or an unusual situation that requires careful attention from individuals approaching the area.

Using extreme caution means that one should not proceed without being fully aware of their surroundings and assessing any risks that may be present. Operators should be prepared to stop or take evasive actions if necessary while interpreting the signal, ensuring safety for themselves and others nearby.

In comparison, other answers imply various levels of action that may not align with safety protocols associated with a flashing light. For instance, proceeding without hesitation or being clear to go does not account for the potential dangers indicated by the flashing lights. Stopping completely might not always be warranted, but rather an indication to be prepared and alert for possible changes in conditions. Therefore, the best approach in response to a flashing red and green light is to use extreme caution.