Question Signs with orange backgrounds are: Answers General warning signs. Construction and maintenance warning signs. Regulatory signs. Explanation The color orange is used only for construction and maintenance warning signs. Take a FREE Practice Test Now This questions appears in the following tests: Kansas Practice Test Delaware Practice Test Mississippi Practice Test Tennessee Practice Test Georgia Practice Test Illinois Practice Test Alabama Practice Test Wyoming Practice Test Maine Practice Test Arizona Practice Test Nebraska Practice Test Wisconsin Practice Test Oklahoma Practice Test South Dakota Practice Test California Practice Test District Of Columbia Practice Test South Carolina Practice Test Connecticut Practice Test Kentucky Practice Test Rhode Island Practice Test Arkansas Practice Test