The UNITED STATES POSTAL SERVICE is san serif and a little bit of decorative because of the way the letter A is. This typeface was printed on the United States Postal Service cars. It is used to help identify the car and also advertise to the people. The typeface is use is appropriate for its purpose because for someone walking on the street, it is very easy to read but with the uniqueness of the letter A is makes the name special.
The word RECYCLING is san serif and it is printed on the recycling trash can. This typeface is appropriate for its purpose because the message is simple and within the word. When someone is in a rush, no one is going to spend time to analyze the word is it was all fancy and difficult to read so making it simple can help communicate the message better.
GOING TO THE AIR? is simple san serif and it is the advertisement for the car service. This advertisement is placed on the phone booth. This type is appropriate for its purpose because no one really stops on the street to read an advertisement. Being that is is on the street, it needs to be simple so the audience can receive the message in a matter of seconds.
REVOLUTION EYES is a phrase in front of a glasses store. The typeface is decorative and slab serif. It is appropriate for its purpose because it is a glasses store so the typeface should be interesting to the eye but also easy to read.