As government officials across a growing South Florida grapple with mass transit options for millions of residents and visitors, a unique 6.2-mile transportation tunnel has been proposed in North Miami Beach. The project by The Boring Co. would connect to 10 sites and would include an extension to the Hard Rock Stadium in Miami Gardens.

According to media reports, the Elon Musk-owned company recently submitted a proposal to city of North Miami Beach officials for review. Tesla vehicles would transport passengers in underground tunnels. The city of Fort Lauderdale is considering a similar project from the same company, a “Las Olas Loop,” that would transport people from downtown to Fort Lauderdale Beach – a 2.5-mile trip in about three minutes.

The North Miami Beach proposal said the initial capacity would be 7,500 passengers per hour – but could eventually be scaled up to handle 15,000. The proposed tunnel would run from a Golden Glades intersection near I-95 to the Newport Pier. A three-mile extension to Hard Rock Stadium would originate from the Golden Glades intersection.

Hard Rock International holds the naming rights to the stadium – which is run by the Miami Dolphins organization. An 18-year naming deal signed in 2016 takes the current contract to 2034. The Seminole Tribe is the parent entity of Hard Rock International.

In addition to Hard Rock Stadium, Golden Glades and Newport Pier, the proposed stations and extensions include the Medical Center at Jackson North Hospital, NE 6th Avenue, The Mall at 163rd Street, the North Miami-Biscayne Intermodal Center, the Intracoastal Mall, SoLē Mia Miami and Florida International University/Biscayne Bay North Miami.

In the proposal, The Boring Co. estimates the project cost at $185 million to $220 million. The proposal argues the cost is less than what a traditional mass transit system would be for a project of such a scope. The proposal asserts that financing could come from the recently passed Infrastructure Investment and Jobs Act – which consists of $110 billion for roads, bridges, and major projects – and that the federal government is likely to rate the project favorably. In addition, the proposal said The Boring Co. would finance a portion of the construction and operation costs.

If approved, the tunnel would take 36 months to plan and build, according to The Boring Co. – assuming permitting advances quickly. A North Miami Beach commissioner recently quoted in a Bloomberg report said the project would also need approval from nearby municipalities and the U.S. Army Corps of Engineers, which could take additional time.