What is the secret of this device deployed in the streets of Dubai

Dubai's Roads and Transport Authority (RTA) responded to a tweet from a social media tweet about the purpose of a device that drivers notice on the asphalt layer of the emirate's streets.

@rta_dubai what are these on the ground? #dubai pic.twitter.com/TLXzMctNcn

In its response, the Authority explained that the Authority is working to collect information on the status of roads, especially intersections, and monitors the number of vehicles passing through, the distance between them and their speed for later use by the concerned authorities in the Authority.