Bauhaus Heavy has got to be the worst choice for a road sign font of all time.
90% of the character decision-making in The Amazing World of Gumball leaves a lot to be desired.
And there are only nine types of vehicles (Elmore Wings doesn't count, as it's an airline) that appear
and are driven on the show (Ford LTD Crown Victoria (forming the basis of various vehicles), Chevy Van (forming the basis of Janice and the Awesome Store), Chrysler minivans and Ford Carousel (forming the basis of the minivan), Dodge Polara (forming the basis of the police car), Ford F-100, Cadillac DeVille Convertible (owned by the Robinsons), Piaggio Vespa (used by Richard in The Job), and Ford Fairmont Squire Wagon (forming the basis of Cartax).). Variety in vehicles would have suited both the characters and the show. However, I won't stray too far into why only select vehicles were used, as it goes off topic here.