In most inner city areas, under what condition are sound signals (horns) allowed?

Sound signals, or horns, are specifically permitted when there is an immediate danger. This usage serves as a safety mechanism to alert other drivers, pedestrians, or cyclists of a potential hazard and to prevent accidents. It's critical to use the horn judiciously and only in scenarios that genuinely warrant it to maintain safety on the road.

Other conditions mentioned, such as honking in response to a red traffic signal, driving slowly, or during heavy traffic, do not align with the standard rules for horn usage. Honking in those situations can lead to confusion or annoyance rather than enhance safety, as it may not indicate an immediate risk. Understanding the appropriate circumstances for horn use is essential for drivers to contribute to a safe driving environment, particularly in busy urban settings where misunderstandings can easily escalate into dangerous situations.