Last Man On Earth by Tim Clay

Reminds me of a Sci-fi short story. Guy woke up to find himself alone, presumably the last human. After spending the day searching for another living being, he snaps and slumps at the base of a demand crosswalk, while repeatedly and uselessly pushing the button. Postscript: He had been locked into solitary confinement to find it how long a human could remain sane with only long delayed radio conversations.
Love the simplicity of composition and the minor but significant highlights.