Tyler had broken his arm in a bicycle accident. A car knocked Tyler down when it came out of a side street without stopping. The accident happened because there was no stop sign at the corner and the car didn't stop. So Tyler decided to try to get the city to put up a stop sign.

First, Tyler wrote a petition（请愿书）to have a stop sign put up with his parents' help. Then, Tyler and his parents asked their neighbors, friends, teachers, classmates… almost everyone they knew to sign the petition. Soon, there were hundreds of names on the petition.

Tyler also got some information about other accidents at the same corner where he had had his own accident. If he could show the city that it was a dangerous corner, they might put up a stop sign there. He hoped that this information and his petition would work.

When the petition was ready, Tyler and his parents went to a meeting of the city council（政务委员会）. They brought along the petition and the other information. After a long wait, Tyler got a chance to tell what had happened to him. He told the story of the bicycle accident and explained his idea. If there were a stop sign at the corner where the accident happened, other kids would be safer.

After that, Tyler read the petition out loud. Then, he handed it and the other information to the council. The city council agreed to consider the request and make a decision before their next meeting.

The next month, Tyler and his parents attended another meeting of the city council. The head of the city council announced that the city had decided to agree to the petition! There would be a stop sign at the corner where Tyler had his accident. Now other kids would be safer when they rode their bikes.