What does a pennant-shaped traffic sign indicate?

A pennant-shaped traffic sign is specifically designed to indicate the start of a no-passing zone. The triangle shape, which points to the right, is a universally recognized symbol for warning drivers that passing is prohibited in that area. This is especially important on two-lane roads where vehicles might be tempted to overtake slower traffic, as it helps to enhance safety by reducing the likelihood of head-on collisions in zones where visibility could be limited. It's crucial for drivers to heed this sign to ensure their safety and the safety of others on the road. Other shapes, like rectangular or octagonal signs, indicate different rules or regulations, but the pennant shape is distinctively used for indicating no passing zones.