What speed limit applies in the infield tunnel?

The speed limit of 50 km/h applies in the infield tunnel, reflecting a balance between efficiency and safety within an area where vehicle movement is controlled due to proximity to airport operations. The essence of this speed limit is grounded in ensuring that vehicles can navigate the tunnel with sufficient speed while also maintaining a safe environment for both drivers and the operational aircraft in the vicinity.

The 25 km/h limit mentioned in the correct answer further enhances safety, likely in specific areas of the tunnel or under specific operating conditions, emphasizing caution in a confined space where visibility may be limited. Such regulations are designed to prevent accidents and ensure the smooth flow of traffic.

Understanding why these specific limits are implemented speaks to the operational requirements of airport facilities, not only for efficiency but also for the safety protocols that are paramount in aviation environments.