Some folks did this in Cap Hill, and it took SDOT approximately five seconds to send a crew out to undo it. https://www.capitolhillseattle.com/2022/11/while-sdot-waits-for-funding-somebody-painted-a-guerilla-crosswalk-at-e-olive-way-and-harvard/
RE: https://mastodon.social/users/debcha/statuses/109655115496370722