Read the following letter! Then answer the questions!

Dear Park Manager,

    Related to the management of Hills Park, I think that cars should be banned in the park. They mustn't be parked along all park roads. The cars should be left in a central car park. We know that Hills Park was built for people, and it wasn't built for automobiles. Most visitors go to the park to get fresh air. Some want to do exercise by cycling, jogging, or walking while enjoying the beauty of the park. Children play here and there with their parent's supervision. However, the cars parked along the park roads disturb their freedom. Last week, there was a small accident in the park. A little boy was hit by a car while he was riding his bicycle. Therefore, I do really think that cars should be banned in the park roads. With this ban, joggers, bikers, and pedestrians will have free rein in the park.

Joy Ferdison

230 Hilsboro, NY

According to the writer, why is the existence of cars in the park annoying?