A large plenum box that fell from a passing truck slowed southbound traffic along Interstate 35E near Commonwealth Drive Wednesday afternoon.
The box apparently fell off a truck after it passed underneath a railroad crossing. The plenum appears to have damaged the pavement and crews were inspecting the bridge to see if it was also damaged.
A plenum box is an important part of an HVAC system's ductwork.
Traffic weaved around the box until crews arrived and dragged it out of the main lanes of traffic.
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No injuries were reported in connection with the incident.
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