The repair -- a black concrete donut surrounding the ends of the column and wrapped with a composite fiber material -- can be deployed on bridges damaged in an earthquake much more quickly than ...

Whether you're an art enthusiast, a history buff, or simply curious about that concrete donut on the National Mall, learn more about its Brutalist background in this new episode of National Treasure.

4-inch high concrete curb separators (similar to ones used on protected bike lanes citywide). The curbs will reduce the amount of space available for car users and create a more predictable flow of ...