>>11031851. Unsure about OP's intention so ask him.
2. Agree these are rarer but they should exist. Can only think of this one from my country: Pok Oi interchange, Yuen Long. Castle Peak Road is at most a divided rural limited-access road.
Conveniently it was further upgraded last year so you can enjoy nice drawings.
http://www.epd.gov.hk/eia/register/report/eiareport/eia_1602008/Html/http://www.epd.gov.hk/eia/register/report/eiareport/eia_1602008/Html/EIA%20Report/Figures/Figure_2.1a.pdfhttp://www.epd.gov.hk/eia/register/report/eiareport/eia_1602008/Html/EIA%20Report/Figures/Figure_8.8b.pdf http://www.epd.gov.hk/eia/register/report/eiareport/eia_1602008/Html/EIA%20Report/Figures/Figure_8.8c.pdfhttp://www.epd.gov.hk/eia/register/report/eiareport/eia_1602008/Html/EIA%20Report/Figures/Figure_8.8d.pdfIf you count gyratories we have Cheung Wing Road Gyratory, Kwun Chung but there's more of a system interchange with two intersecting avenues, although one of them (Castle Peak Road again) continues controlled-access southeast and has a short stretch of limited-access west.
There may be more candidate interchange for upgrading to such, one particularly busy that unfortunately has an elevated metro station across the roundabout island.