418 What is the safe distance for large vehicles to drive through a tunnel that is 4 km long or more, or announced by the competent authority?
(A) 40 meters
(B) 50 meters
(C) 100 meters
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統計: A(0), B(2), C(3), D(0), E(0) #2214879
統計: A(0), B(2), C(3), D(0), E(0) #2214879