Question

a driver is in dense traffic, and there is a disturbance in front of him. what does the driver do, and what is the effect of this action?
a the driver speeds up, which slows down traffic ahead of them.
b the driver brakes harder, which slows down traffic ahead of them.
c the driver speeds up, which slows down traffic behind them.
d the driver brakes harder, which slows down traffic behind them.

Explanation:

When there is a disturbance in front of a driver in dense traffic, the logical and safe action is to brake harder to avoid collision. In traffic flow, when a driver brakes harder, the vehicles behind need to also react, which slows down the traffic behind. Speeding up in such a situation would be dangerous and not a typical response to a disturbance ahead.

Answer:

D. The driver brakes harder, which slows down traffic behind them.