These signs face perpendicular to the traffic flow, and are usually double-sided. They are great for condensed or high traffic shopping areas. Blade signs are very effective for foot traffic, for instance shoppers walking along a sidewalk or mall lined with retail stores or restaurants. They also can be effective for vehicle traffic in condensed areas. Blade signs are one of the oldest type of signs and work well for custom built or antiquated signs. They complement well with wall signs and awnings.