Colour rings around reports
Have colour rings around reported Hazzards on a timer. Eg it's red when first reported and stays red when the report "still there" button is pressed by re setting a timer. The ring turns blue after a set time until or unless the "not there" button is pressed and the report has been removed. This will let drivers know if the report is current and up to date or if it's an old report and has been ignored and not removed.