Looks like the introduced J. cognatus. Photos of the base of the plant to show presence of elongated leaf blades (or not) would confirm the ID. https://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=sp&name=Juncus~cognatus
Lots of experiments on how to kill this stuff. It seems like Grazon Advance is having the best luck but if you have a magic bullet there are lots of people who would like to know. I’ll get to “monitor” this roadside area every time I go to KV.
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