Nervous about son driving

Hi all my son is 18 and just passed his driving test!

obviously I’m very proud. But, despite actively encouraging him to drive I am extremely anxious about him driving himself further than our home city. His a great driver, my worry is his ability to cope should something go wrong like an accident. He can overreact with me and his dad, but doesn’t when out alone.

His young for his age sometimes acting like a younger teenager.

looking for any guidance on managing this without restricting his independence.

thanks for reading