Is this a terrible metaphor?

I’m writing a poem and I’m trying to write a metaphor. This is the one I wrote. Inside my head is an interstate highway. It's worldwide. The flow of traffic is always busy, never ceases to die. I’m scanning with a radar detector for each car that passes by. The speed is a sign of how fast my brain works... show more I’m writing a poem and I’m trying to write a metaphor. This is the one I wrote.

Inside my head is an interstate highway. It's worldwide.
The flow of traffic is always busy, never ceases to die.
I’m scanning with a radar detector for each car that passes by.
The speed is a sign of how fast my brain works against time.
And to think this all happens inside an introvert mind.

Alright, so the car represents my thoughts. Should I put the word “thoughts” in there somewhere so the readers won’t get confused? Or just leave it as it is? Also if you see a problem can you let me know? This is my first metaphor
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