Runaway Road by Devney Perry

Londyn McCormack didn’t have a typical childhood. She ran away from home at sixteen, escaping parents more interested in drugs than their daughter. She doesn’t have loving siblings or an adorable pet. Her only family is the five other runaway kids who shared her junkyard home.

Life pulled them all in separate directions, taking her to Boston. For a short time, she thought she’d found something permanent. But after a devastating divorce, she’s running away again, this time to find a lost friend.
She’s driving across the country in her convertible. As a teenager, the rusty car was her shelter. As an adult, it’s her ride to freedom.

Except one flat tire derails her trip. Her life collides with Brooks Cohen. They walked away from the first crash. The second might destroy them both.