Hazard/Siren Display on map

Does anyone know what this map displays? I saw this for the first time and there were emergency police vehicles nearby? is it related - maybe showing active sirens nearby?

Image: https://postimg.cc/hfNVpNY1

0 aweatherall 2 days ago

Are you using the standard Garmin maps or have you installed some 3rd party maps? If so could you identify those maps.

0 Garmin-Blake 2 days ago

CHRIS_GARMIN Would you be willing to provide the date of this ride, and consent for us to pull this .FIT file to look into this for you?

0 CHRIS_GARMIN 21 hours ago in reply to Garmin-Blake

I replied in your DM. it was June 24th, 8.30 am German time.