The mayor of Fort Lauderdale, Florida, said Musk's tunnel drilling company Boring Company had submitted a bid to build an underground transportation system between the city center and the beach.

Fort Lauderdale Mayor Dean Trantalis (Dean Trantalis) tweeted on Tuesday"this may be a really innovative way to reduce traffic congestion," it said. " Other companies have 45 days to submit competitive proposals, he added.

The terms of the tender were not disclosed and Boring Company had no immediate comment.

In June this year, Boring Company opened its first commercial tunnel project in Las Vegas, allowing tourists to use the human-driven TeslaThe car passed through the city's conference center. The 1.7-mile (2.7 km) tunnel reduces the "45-minute walk time to about 2 minutes".