Abstract
A study to determine the effectiveness of five breakway lighting standard base designs in reducing the severity of vehicle impacts is reported. The head-on full scale dynamic tests were conducted on 30-ft lighting standards mounted on the various frangible or slip base designs. All of the standards were steel except for one aluminum design. The tests were conducted on a 6-in. high cast aluminum insert base a notched bolt insert design, a multi-directional steel slip base design developed by Texas Transportation Institute a 20-in, high aluminum transformer base, and an aluminum standard fitted enz.