Buzz·Posted on Nov 13, 201217 Signs Improved By GraffitiAnd adding "ing" to speed hump is not an improvement.by Molly HoranBuzzFeed InternLinkFacebookPinterestTwitterMail 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17.