Solar road studs are typically installed on the road surface and use solar panels to collect and store energy from the sun during the day. This stored energy powers LED lights embedded within the studs, which emit bright and visible light. The lights can be customized to different colors, such as white, red, green, or blue, depending on the desired application. The use of solar road studs offers several advantages. Firstly, they improve road safety by enhancing visibility, particularly on dark roads or in areas with limited street lighting. They serve as a visual aid, helping drivers stay within their lanes and navigate curves, intersections, or hazards. Additionally, solar road studs are designed to be durable and weather-resistant, ensuring reliable performance even in harsh conditions. While I don't have specific statistics on the popularity of solar-powered road studs in South America, their adoption has been increasing in many countries worldwide. Governments and transportation authorities often deploy these devices on highways, expressways, rural roads, and other critical road sections to enhance road safety and reduce accidents. It's worth noting that the popularity and adoption of LED road stud lights can vary across different countries and regions within South America. Factors such as infrastructure development, road safety priorities, and budget allocations can influence the extent to which these devices are used. To obtain more detailed information about the popularity of solar road studs in a specific South American country, it would be best to refer to local transportation authorities or conduct further research specific to that region.