You are driving downhill on a steep, narrow road and a vehicle is coming up the hill. What should you do?

Vehicles moving downhill should give way to vehicles moving uphill
Sound your horn and signal the other vehicle to move out of the way
Carry on - the other vehicle will move out of the way
Flash your headlights to determine who goes first

Analysis:

In New Zealand, obeying traffic rules is not only a legal requirement but also crucial for ensuring the safety of all road users. Drivers should understand and comply with all traffic regulations, especially under complex or special road conditions. When driving on narrow, steep mountain roads, accurate judgment and behavior are particularly important, as such conditions place higher demands on vehicle control and collision avoidance.

Choice 1: "Downhill vehicles should give way to uphill vehicles" is the correct rule. This rule is primarily based on principles of physics and safety considerations. When an uphill vehicle is climbing and is forced to stop or slow down, it becomes more difficult to restart, which may lead to slipping or getting stuck on the road, increasing the risk of traffic congestion and even accidents. Therefore, to maintain smooth and safe traffic flow, downhill vehicles should give way to vehicles making the effort to climb uphill. This rule reflects an understanding of the difficulties of driving under special road conditions and a concern for the safety of all road users.

The importance of this rule lies in:
- Promoting harmonious coexistence on the roads, ensuring traffic safety and smoothness in special sections.
- Reducing traffic accidents caused by misjudgment or non-compliance with the rules.
- Enhancing drivers' awareness of the driving requirements under special road conditions, improving driving skills and safety awareness.