Axios Pro Exclusive ContentIllustration: Aïda Amer/AxiosAirGarage, a parking facilities operating system developer, has raised $23 million in Series B funding led by Headline Growth, co-founder and CEO Jonathon Barkl exclusively tells Axios Pro.Why it matters: There are eight parking spots for every car in the U.S., making it a highly inefficient industry.How it works: AirGarage's platform collects and analyzes parking facilities' data to improve efficiency. The company operates the facilities, ...