Bay Area Rapid Transit (BART) Practice Exam 2025 - Free BART Practice Questions and Study Guide

Opening side doors using an exterior or interior key switch is a practical method that allows for accessibility in various situations. Key switches can provide authorized personnel with the means to unlock doors without relying on electronic devices, ensuring that access is guaranteed even when power sources may be unavailable.

This method is particularly useful in emergencies where quick access is essential. It enhances operational flexibility by offering both interior and exterior options for unlocking doors, catering to different scenarios such as maintenance needs or emergency evacuations.

The other options, while they may seem plausible, do not provide the same level of reliability or versatility for regular and emergency access. Remote controls depend on battery life and might fail in critical situations, while the operator panel requires specific operational protocols. Manual emergency tools are typically used as a last resort when other methods fail, rather than being a primary means of access.