For the past few weeks, workers have been hacking with saws at the soaring bridges that lace between the Glendale and Ventura freeways in Glendale.
It would seem that they are cutting miniature trapdoors into the freeway.
And, indeed, they are.
For the next 10 months, workers will be squeezing in and out of those doors into the honeycombed concrete chambers that make up the freeway bridges.
With electric rigs and tubular augers, they will drill holes into the concrete inner structures. When they are done, there will be a mile of holes, each as much as 7 feet long and 4 inches in diameter.
Because of those holes, the interchange will be much stronger.
The solution to this apparent paradox is cable.
Sewn through the holes like thread, the cable will attach to brackets on the inner walls, binding together the mammoth stepped expansion joints, called hinges, where one segment of the elevated road joins another.