Wikipedia:Articles for deletion/Berlin Circle (traffic circle)
Plenty of  significant coverage, easily passes . Whether or not it is current, future, or former is irelevant - notbility is not temporary. It certainly seems to be part of an encyclopedic list of such features as noted by
— User:Alansohn, 12:44, 10 August 2008 (UTC)
Stance: keep
Cited policy: WP:RS||WP:NOTE (Wikipedia:Reliable sources)