Wikipedia says this song is the sequel to Radar Love. Radar love appears to be a love song. As one lover races through the night to be with his mate. He hears a calling that makes him go to her. Twilight Zone, to me, is the story after he finds her. He is running from the law with a gun. I assume, he found his lover with someone else and he has shot them.
The line "My beacon's been moved under moon and star" kinda sounds line he is just running into what may seem like an endless night.
"This is a madhouse. Feels like being cloned." May mean he can't process what has happened, he acted on impulse and is "sitting beside himself" so to speak.
This is not a song about drugs or life on the road, etc.. Hate to bust any bubbles but that's the facts jack. It is all in first person because he's out on the road alone. This man has traveled out of its usual area and he is trying to figure things out but he's confused.