If the driver feel tired when driving on an expressway,he should  immediately stop to have a rest. Answer:  ×

When bicycles ahead obstruct the traffic flow, the driver may honk to remind them, speed up and bypass. Answer:  ×

When a vehicle passes a level crossing, the driver should use the low gear to pass and should not change gear halfway in order to avoid engine kill. Answer:  √

It is prohibited to overtake when driving in a tunnel. Answer:  √

When passing through an overflowing road, a high gear should be used to pass rapidly. Answer:  ×