One of the most unusual sights for people traveling through Oregon’s I-5 Interstate Bridge Trunnion Replacement Project has been the machine that moves the concrete zipper barriers on the southbound span into their proper lane alignment.
Twice a day, every day, the machine moves the concrete barriers that separate traffic on the southbound span, picking up the barriers from one lane and setting them out in their new alignment on the other.
- Around 2 a.m., the barrier machine sets the alignment for the morning commute: two southbound lanes and one northbound.
- Around noon, it sets up for the afternoon alignment: two northbound lanes and one southbound.
Moving 6,400 feet of concrete barrier doesn’t take long, about 20 to 30 minutes, with traffic passing by easily by during the process. The zipper barrier machine does move slowly and travelers should be aware of the barrier moving and use caution when they see and pass the machine.
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