Convex mirrors: Question Convex mirrors: Answers Cannot be used on vehicles transporting hazardous materials. Can replace flat mirrors. Can be help a driver see a large area. Are illegal in most states. Explanation Convex mirrors are curved to provide drivers with wider views of the road than can be provided by flat mirrors. However, convex mirrors also make objects appear to be smaller and farther away than they really are. This questions appears in the following tests: Indiana Class A Knowledge Test New Jersey Class A Knowledge Test