“wang-wang” is a term used in the Philippines to refer to police sirens, especially when the sirens are coming from police cars escorting VIPs through traffic while the non-VIPs get stuck and have to wait. This sign essentially boils down to “don’t cut in line”.

https://opinion.inquirer.net/160073/wang-wang-i-have-returned “Wang-Wang is not only sirens, policemen and soldiers escorting their VIP patrons, it is a traditional face of elitism. When streets are wide and traffic is light, as when wang-wang started in the 1900s, the people looked at them with some awe. The people knew an important leader was around.”

https://www.gmanetwork.com/news/lifestyle/content/275155/and-the-word-of-the-year-is-wang-wang/story/