There is no mandate, federal or otherwise, to use the black-and-white lines, Toomey said. It’s a matter of preference by design engineers in applications where the contrast is most needed.

Every photographer at least once in their lives has dabbled withblack and white photography. Some may have discovered this in ...

According to Burke, the new black-and-white lines are called contrast markings, which are designed to improve line visibility in different weather conditions. The markings consist of alternating ...