I see the signs about the speed limit strictly enforced through Summerfield, but have never seen any kind of security doing this. Does it exist?

Summerfield is part of the City of Tigard. Traffic control falls under their jurisdiction. There is a long history of speeding through our neighborhoods, both by residents and non-residents (some using as a cut-through, avoiding Durham or Hall). Our City of Tigard Liaison routinely asks for enhanced patrols from the City of Tigard.