NASHVILLE, Tenn. (WTVF) — Workers from a Nashville excavation company have left Elon Musk's Boring Company tunnel project, citing safety concerns and unpaid invoices as the ambitious underground transit system enters a critical construction phase.

Shane Trucking and Excavating told the Nashville Banner that a crew walked off the job over safety issues and back pay disputes. The departure comes just as the Boring Company's first tunneling machine, customized for Nashville's geology, arrived last week with tunneling scheduled to begin later this year.

The Boring Company announced plans in July to build an underground tunnel system connecting downtown Nashville to the airport. Company officials emphasized that no public funds would be used for the project, which they say will include arou

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