423Which of the following is NOT the purpose of traffic control for closing down roads and bridges?
(A) Roads and bridges are prone to accidents, and motorists who go through these sections are putting themselves under great danger; therefore, roads or bridges should be closed in advance to prevent motorists from entering dangerous areas which may lead to death or loss of property
(B) Roads under construction or that have already been damaged should be closed down to speed up the repairs and ensure safety for drivers
(C) Closing down roads andbridges causes inconvenience for drivers and interrupts their trips.