Which statement is true regarding contra-flow bus lanes?

Contra-flow bus lanes are specially designed lanes on the road that allow buses to travel in the opposite direction to the general flow of traffic. This design is aimed at facilitating public transport and improving traffic conditions for buses, especially in areas where the street configuration may not readily accommodate dedicated bus routes.

The statement that they are exclusively for buses is correct because the primary purpose of these lanes is to provide dedicated space for buses to operate more efficiently without being impeded by the general traffic. It ensures that buses can maintain timeliness and reliability during their service.

Other options suggest wider access to various vehicles which could undermine the primary objective of maintaining a clear path for public transport. For example, if all vehicles were allowed to use the contra-flow lanes, it could lead to congestion and conflict, diminishing the effectiveness of the bus service. Similarly, allowing taxis during night hours or sharing the lane with cyclists without restrictions could introduce safety concerns and operational challenges that contra-flow bus lanes are designed to avoid.