Write a letter of complaint. follow the rules for a formal letter, and use the full-block style. the complaint maybe about anything you wish such as argue for or against the limitation of speed limits

How to write a Letter of Complaint: 
1. Address your letter to the appropriate person and/or department.
2. Address the problem you are writing about in the first line and be specific- remember managers and business owners are usually pretty busy so make it short and to the point to ensure it captures their attention quickly.
3. Advise them of what resolutions or outcome you would like to see. 
4. Attach copies of supporting documentation (any proof you may have to support your complaint)
5. List a time frame in which you expect to see the issue resolved. 
6. Thank them for their time and concern and finish the letter respectfully . 

*** Everyone had their own writing style and any halfway good teacher will know if you turn in a letter that is not written in your writing style.  :) .   I hope this helps.