What action should be taken if a bus driver detects a mechanical issue while driving?

When a bus driver detects a mechanical issue while driving, the appropriate action is to pull over safely and assess the situation. This approach ensures the immediate safety of the driver, passengers, and other road users. By stopping the vehicle in a safe location, the driver can evaluate the mechanical issue more thoroughly to determine if it is a serious problem that requires immediate attention or if it is something that can be resolved on the spot.

Assessing the problem also prevents the risk of further damage to the vehicle or endangering others on the road. Continuing to drive with a mechanical issue, as suggested in the first option, can lead to more severe complications, including a breakdown or an accident. Calling for assistance while driving presents distractions and could further impair the driver's ability to control the vehicle, which increases risk. Ignoring the problem until the next scheduled maintenance is not advisable because it may escalate into a more significant and potentially dangerous issue. Thus, safely pulling over and assessing the situation is the most responsible and prudent action for a bus driver facing mechanical concerns.