While the number of police and other vehicles disrupted traffic, the road was not closed, and businesses, including the site where the incident happened, continued to operate, many with heavy traffic including large trucks.
Attempts to contact the company late Tuesday for comment were unsuccessful, but it is understood it is a major provider of forklift pallets, and offers work for some people on community work sentences.
A Corrections Service spokesperson said that did not involve workers on release-to-work programmes.
There was no information to suggest anyone on a Corrections-managed sentence was involved, the spokesperson said.