单元 4 - 4G

A pedestrian crossing is a marked area on a road or street where people are allowed to cross safely. It is typically located at intersections or other high-traffic areas and is often indicated by signs, painted lines, or lights to make it clear to drivers where pedestrians may cross. Pedestrian crossings help ensure the safety of people walking across the street by giving them a designated place to cross, and in some cases, traffic signals may control when it is safe for pedestrians to move and when vehicles should stop.

A road sign is a sign placed along or above roads to communicate important information to drivers and pedestrians. These signs help control traffic, provide warnings, and give directions. Road signs can show speed limits, indicate upcoming hazards, or guide people to different routes or destinations. They come in different shapes and colors, with each design having a specific meaning. Road signs are essential for keeping traffic organized, ensuring safety, and helping travelers navigate their way.

Traffic lights are signaling devices used to control the flow of traffic at intersections. They typically have three colors: red, yellow, and green. Red means stop, yellow signals caution or prepare to stop, and green indicates go. These lights help prevent accidents by ensuring that vehicles and pedestrians move safely and in an organized manner. Traffic lights are often placed at busy intersections or areas where controlled movement is needed to manage traffic and pedestrian flow.

A billboard is a large outdoor advertising structure that displays advertisements, messages, or images to the public. It is typically positioned in places where many people can see it from a distance, such as near highways, busy streets, or in high-traffic areas. Billboards are usually made of a large, flat surface that can be printed with large graphics or text. They are used by companies or organizations to promote products, services, or events and are intended to capture the attention of people as they pass by.

A fire hydrant is a pipe located along streets or in public areas that provides a source of water for firefighters to use in case of a fire. It is typically made of metal and is painted in bright colors, often red or yellow, to make it easy to spot. Firefighters connect hoses to the hydrant to quickly access water, which is essential for putting out fires. Hydrants are usually placed at regular intervals in urban and suburban areas, ensuring that water is available when needed for emergencies. They are an important safety feature for fire protection.

A parking meter is a device placed on streets where drivers pay a fee to park their vehicles for a set amount of time. The meter is usually located near parking spaces, and drivers must insert coins, cards, or use a mobile app to pay for parking. The meter tracks how long the vehicle is parked and signals when the time is up. If the time expires and the vehicle is still parked, the driver may be fined.

A telephone pole is a tall, vertical structure used to support and carry telephone wires or electrical cables above the ground. These poles are typically made of wood, metal, or concrete and are placed along streets or rural areas to help connect telephone services and power lines. Telephone poles are crucial for transmitting signals and electricity over long distances, allowing communication and providing power to homes and businesses. They are spaced regularly along roads and may also support other utility lines, such as cable or Internet connections.