Yes, and sometimes a bit more. Seriously, henbane vs khat. Khat is used for green around Cali highway cloverleafs. No surprise someone figured it out. The state growing their drug of choice. See the Somalis for khat/Muslim induced action.
RE: Khat and cloverleafs
Not around any of them I’ve worked on, and that is pretty much every one of them in the Bay Area and a significant percentage north of San Luis Obispo...