A "No Parking Sign" is a traffic control sign that indicates parking is prohibited in a specific area. These signs are typically placed along streets, in parking lots, or near entrances to buildings. They help maintain traffic flow, ensure safety, and prevent obstruction of emergency vehicles. The sign usually features a red circle with a diagonal line crossing over a car symbol, clearly conveying the message. Local authorities, such as city councils or transportation departments, are responsible for placing these signs where necessary to regulate parking and manage public spaces effectively.