Final answer:
A pennant-shaped sign indicates a no-passing zone, helping ensure drivers do not overtake other vehicles in areas where it is considered unsafe.
Step-by-step explanation:
A pennant-shaped sign indicates a no-passing zone on the road. This sign, resembling an isosceles triangle with one of the longer edges on the top, is pointed horizontally and to the right. It is meant to inform drivers that they are approaching an area where overtaking and passing other vehicles is dangerous and prohibited. The sign usually appears on the left side of the road, indicating the start of a no-passing zone that applies to traffic in the lane closest to the sign.
Road signs are essential for maintaining safety and proper driving etiquette on the road. As with understanding that you must stop your vehicle at a red traffic light, recognizing road signs and knowing their meanings is critical for drivers to navigate streets and highways safely.