Chevron Sign Black & White Post Mount Sign Diagram 515This black and white sign features a prominent white chevron that indicates that there is a harsh turn in the oncoming roadway. These post mounted signs are frequently seen on roundabouts or on tight bends on countryside roads. Giving drivers better warning before hitting the bend. When used on a roundabout this sign faces joining traffic to indicate the direction of traffic flow. In this application, they are often used in conjunction with a diagram