Elon Musk says the first tunnel is "almost done."

Posting on Twitter on Sunday night, the Boring Company founder and CEO announced the first test tunnel of the ambitious ultra-high-speed hyperloop project in Los Angeles will be open for public rides on Dec. 11.

The very first LA tunnel, which will primarily function to transport pedestrians and cyclists, was officially completed in May, after digging permission was granted in August last year.

Opens Dec 10 — Elon Musk (@elonmusk) October 22, 2018

Musk has previously announced that the service will apparently cost passengers just $1 to ride on shuttles within the city when it officially launches.

On Sunday, the CEO tweeted that the test tunnel's opening night event will happen on Dec. 10 with free rides for the public the following day. leaving from near SpaceX headquarters in Hawthorne, California.

Opening event that night & free rides for the public next day — Elon Musk (@elonmusk) October 22, 2018

Where does the tunnel run? According to the Boring Company's website, it runs from SpaceX's parking lot east of Crenshaw Boulevard and south of 120th Street, then it turns west under 120th Street, and remains underground along 120th Street for 2 miles.

The top speed in the tunnel, according to the CEO, will be 155 mph (250 km/h).

155 mph | 250 km/h — Elon Musk (@elonmusk) October 22, 2018

Musk is somewhat famed for missing deadlines. But guys, Dec. 10 is apparently the actual, real life, not-to-be-delayed date it'll launch.

I think real — Elon Musk (@elonmusk) October 22, 2018

Elsewhere, Musk also got permission from Maryland officials for his Boring Company to build a 10-mile tunnel in the state last year. It will mark the first part of Musk's envisioned hyperloop to transport people underground between New York and Washington, D.C. in just 29 minutes.

27 PHOTOS Hyperloop See Gallery Hyperloop A full-scale passenger Hyperloop capsule is presented by Hyperloop Transportation Technologies on October 2, 2018 in El Puerto de Santa Maria. - A hyperloop is a shuttle that travels on magnetic rails, somewhat like a train, but which runs in a tube with little or no air. In theory, hyperloops could allow travel faster than the speed of sound. Virgin Hyperloop One, backed by British tycoon Richard Branson, has been testing its hyperloop system in Nevada in the United States with speeds reaching 240 miles (386 kilometres) an hour, and is planning three production systems in service by 2021. (Photo by CRISTINA QUICLER / AFP) (Photo credit should read CRISTINA QUICLER/AFP/Getty Images) Virgin Hyperloop One aims to be the first working hyperloop in the world. One of the company’s biggest projects is a 75-mile route from Mumbai to Pune, India A Virgin Hyperloop One test pod will be at the American Royal World Series of Barbecue at the Kansas Speedway on Saturday. Las Vegas NV July 7/21/2018: Virgin Hyperloop One test site near Las Vegas NV showing the first complete test track for the XP-1. Virgin Hyperloop One formerly known as Hyperloop One, is an American transportation technology company that was formed in 2014, and reorganized and renamed in 2017, working to commercialize the high-speed technology concept called Hyperloop. A man touches the rear of a full-scale passenger Hyperloop capsule unveiled by Hyperloop Transportation Technologies on October 2, 2018 in El Puerto de Santa Maria. - A hyperloop is a shuttle that travels on magnetic rails, somewhat like a train, but which runs in a tube with little or no air. In theory, hyperloops could allow travel faster than the speed of sound. Virgin Hyperloop One, backed by British tycoon Richard Branson, has been testing its hyperloop system in Nevada in the United States with speeds reaching 240 miles (386 kilometres) an hour, and is planning three production systems in service by 2021. (Photo by CRISTINA QUICLER / AFP) (Photo credit should read CRISTINA QUICLER/AFP/Getty Images) Richard Branson talks next to Sultan Ahmed bin Sulayem during the Hyperloop One presentation aboard the Queen Elizabeth 2 in Dubai, United Arab Emirates, Sunday, April 29, 2018. DP World's chairman and CEO Sultan Ahmed bin Sulayem said Sunday that Virgin Hyperloop One would launch a freight service called DP World Cargospeed. (AP Photo/Kamran Jebreili) Virgin Hyperloop One Hyperloop tubes are displayed during the first test of the propulsion system at the Hyperloop One Test and Safety site on May 11, 2016 in North Las Vegas, Nevada. The company plans to create a fully operational hyperloop system by 2020. (Photo by David Becker/Getty Images,) Elon Musk speaks at the Hyperloop pod competition on January 29, 2017. To accelerate the development of a functional Hyperloop prototype, a high speed transportation system that Musk proposed in 2013, SpaceX staged a student pod competition. (Kate Allen/Toronto Star via Getty Images) An employee carries out final checks on a vacuum system before delivery to the Hyperloop transportation system technology applications company at the Oerlikon Leybold Vacuum GmbH factory in Cologne, Germany, on Thursday, June 30, 2016. In 2013, billionaire Elon Musk first unveiled his vision of a transportation system in which capsules hurtling on a cushion of air would whisk people at 700 miles per hour, traveling from San Francisco to Los Angeles in half an hour. (Krisztian Bocsi/Bloomberg via Getty Images The rLoop team shows their INFIRA pod during the SpaceX Hyperloop competition in Hawthorne, California on January 29, 2017. Students from 30 colleges and universities from the US and around the world are taking part in testing their pods on a 1.25 kilometer-long Hyperloop track at the SpaceX headquarters. (GENE BLEVINS/AFP/Getty Images) Sand rises from the track as a test sled is slowed during the first test of the propulsion system at the Hyperloop One Test and Safety site on May 11, 2016 in North Las Vegas, Nevada. Hyperloop One stages the first public demonstration of a key component of the startup's futuristic rail transit concept that could one day ferry passengers at near supersonic speeds. (JOHN GURZINSKI/AFP/Getty Images) People photograph the interior of a Hyperloop tube after the first test of a propulsion system at the Hyperloop One Test and Safety site on May 11, 2016 in North Las Vegas, Nevada. The company plans to create a fully operational hyperloop system by 2020. (Photo by David Becker/Getty Images,) SpaceX CEO Elon Musk(C) speaks during the SpaceX Hyperloop pod competition in Hawthorne, California on January 29, 2017. Students from 30 colleges and universities from the US and around the world are taking part in testing their pods on a 1.25 kilometer-long Hyperloop track at the SpaceX headquarters. (GENE BLEVINS/AFP/Getty Images) The EDGE pod, the smallest hyperloop pod designed by Keio University in Japan, is displayed during the SpaceX Hyperloop competition in Hawthorne, California on January 29, 2017. Students from 30 colleges and universities from the US and around the world are taking part in testing their pods on a 1.25 kilometer-long Hyperloop track at the SpaceX headquarters. (GENE BLEVINS/AFP/Getty Images) Robert 'Rob' Lloyd, chief executive officer of Hyperloop Transport Technologies Inc., gestures as he speaks during Automobility LA ahead of the Los Angeles Auto Show in Los Angeles, California, U.S., on Wednesday, Nov. 16, 2016. The Connected Car Expo and LA Auto Show press days have merged to form AutoMobility LA. The show is open to the public November 18-27. (Patrick T. Fallon/Bloomberg via Getty Images) A winch supports screws before being inserted into a Dryvac compressing screw vacuum pump at the Oerlikon Leybold Vacuum GmbH factory in Cologne, Germany, on Thursday, June 30, 2016. In 2013, billionaire Elon Musk first unveiled his vision of a transportation system in which capsules hurtling on a cushion of air would whisk people at 700 miles (1,130 kilometers) per hour, traveling from San Francisco to Los Angeles in half an hour. (Krisztian Bocsi/Bloomberg via Getty Images) An employee holds a bearing ring during the assembly of a Dryvac compressing screw vacuum pump at the Oerlikon Leybold Vacuum GmbH factory in Cologne, Germany, on Thursday, June 30, 2016. In 2013, billionaire Elon Musk first unveiled his vision of a transportation system in which capsules hurtling on a cushion of air would whisk people at 700 miles per hour, traveling from San Francisco to Los Angeles in half an hour. (Krisztian Bocsi/Bloomberg via Getty Images) A Hyperloop tube is displayed during the first test of the propulsion system at the Hyperloop One Test and Safety site on May 11, 2016 in North Las Vegas, Nevada. The company plans to create a fully operational hyperloop system by 2020. (Photo by David Becker/Getty Images,) A recovery vehicle and a test sled sit on rails after the first test of the propulsion system at the Hyperloop One Test and Safety site on May 11, 2016 in Las Vegas, Nevada. Hyperloop One stages the first public demonstration of a key component of the startup's futuristic rail transit concept that could one day ferry passengers at near supersonic speeds. (JOHN GURZINSKI/AFP/Getty Images) People look at a demonstration test sled after the first test of the propulsion system at the Hyperloop One Test and Safety site on May 11, 2016 in North Las Vegas, Nevada. The company plans to create a fully operational hyperloop system by 2020. (Photo by David Becker/Getty Images,) A test sled is propelled along a set of tracks during the first test of the propulsion system at the Hyperloop One Test and Safety site on May 11, 2016 in North Las Vegas, Nevada. The company plans to create a fully operational hyperloop system by 2020. (Photo by David Becker/Getty Images,) The pod displayed in the booth for MIT Hyperloop, The Massachusetts Institute of Technology, during the SpaceX Hyperloop Pod Competition in Hawthorne, Los Angeles, California, U.S., January 29, 2017. (REUTERS/Monica Almeida) The pod cover for team Openloop, a six school alliance including Northeastern, Memorial University, Princeton, Cornell, Harvey Mudd College and the University of Michigan at the SpaceX Hyperloop Pod Competition in Hawthorne, Los Angeles, California, U.S., January 29, 2017. (REUTERS/Monica Almeida) Team members from WARR Hyderloop, Technical University of Munich place their pod on the track during the SpaceX Hyperloop Pod Competition in Hawthorne, Los Angeles, California, U.S., January 29, 2017. (REUTERS/Monica Almeida) A student from the Delft University of Technology inspects the team's pod before it enters the Hyperloop test track. To accelerate the development of a functional Hyperloop prototype, a high speed transportation system that Musk proposed in 2013, SpaceX staged a student pod competition. (Kate Allen/Toronto Star via Getty Images) Robert 'Rob' Lloyd, chief executive officer of Hyperloop Transport Technologies Inc., gestures as he speaks during Automobility LA ahead of the Los Angeles Auto Show in Los Angeles, California, U.S., on Wednesday, Nov. 16, 2016. The Connected Car Expo and LA Auto Show press days have merged to form AutoMobility LA. The show is open to the public November 18-27. (Patrick T. Fallon/Bloomberg via Getty Images) Up Next See Gallery Discover More Like This HIDE CAPTION SHOW CAPTION of SEE ALL BACK TO SLIDE

In June, Musk also won a bid to build a high-speed train from Chicago’s O'Hare International Airport to downtown. The new rail line, or Chicago Express Loop, will see 12-minute trips in electric vehicles called "skates," from the airport's new terminals to the Block 37 super-station downtown.

Now, who's keen to line up for a free ride? Three words: get there early.

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