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Why The Boring Company’s $10 million dollars per mile price tag is a game changer
With The Boring Company, Elon Musk hopes to overcome the pitfalls that drive up the costs of underground rail transport construction using good old-fashioned innovation with a dash of Silicon Valley startup dust (dirt?). Currently, most U.S. local and state governments (i.e., tax payers) hand over an average of $200-$500 million dollars per mile to construct a subway system, with hundreds of millions more per mile a common occurrence and even a $1 billion dollars per mile price tag having happened a few times already. The reasons for such expense seems to be multi-faceted and stubborn: regulations, unions, and project management. So, when the Tesla CEO and Boring Company founder cited $10 million dollars as the final price of their mile-long demonstration tunnel, including internal infrastructure, lighting, comms/video, safety systems, ventilation, and tracks, he seemed to be threatening to completely upend yet another industry, this one having been at the core of transportation for nearly 200 years.
“I like trains, by the way. I really like trains a lot,” Musk assured his press audience at the company’s recent demonstration tunnel opening event. The Boring Company (TBC) began as a Twitter discussion wherein the tech mogul was venting about “soul-destroying” traffic in Los Angeles. A concept animation followed soon after (as well as hats and not-a-flamethrowers), imagining a transportation system where cars would be shuttled around at high speeds underground on electric skates. Ideas flowed, tunneling began, and the result of all those efforts went on display December 18, 2018, demo rides included. A rideable 1.14 mile tunnel had been constructed from Crenshaw Boulevard across from the Hawthorne, California headquarters of SpaceX, Musk’s private rocket company, to the 120th Street/Prairie Avenue crossroad of Hawthorne.
Around this time last year, Brian Rosenthal of the New York Times exposed several astonishing factors that added up to a $3.5 billion dollars per mile cost to construct a 3.5 mile tunnel to connect Grand Central Terminal to the Long Island Rail Road in New York City, aka the “East Side Access”. An infamous “first”, this price tag is 7 times more than the average of anywhere else in the world. A combination of trade union, construction company, and consulting firm practices, including significant staff redundancy, bred an environment ripe for cost pile-ups, and both incompetence and the lack of oversight within New York’s Metropolitan Transportation Authority (MTA) added significantly to the issue. While the specific amount of money spent made the system’s cost unique in the world, the general underlying issues were not uncommon.
New York may be an exception to the already high-cost of rail construction rule, but there’s the rub: It’s already incredibly expensive. As documented in numerous articles by Alon Levy, an independent journalist whose 2011 blog post on the topic inspired the research that eventually led to the Times piece, $100-$500 million dollars per mile is a typical cost for building railed transporation worldwide. “These are crazy numbers,” Musk exclaimed at the tunnel opening event after summarizing the multiple billions of dollars short tunneling projects cost to complete in L.A. and New York. If the building cost wasn’t enough sticker shock, it gets worse: The daily operating costs of rail systems in the U.S. exceed the amount earned.
Another metric that is used to estimate the true cost of rail construction is cost per rider. After the time and money is spent building a public rail system, it needs to be staffed and repaired, expenses which are difficult to match with revenue without a large number of riders. As cited by Alon Levy in an article Elon Musk tweeted recently, New York’s Second Avenue Subway will cost $25,000 per rider to complete 200,000 trips per day. In Los Angeles, the Purple Line will cost $45,000 per rider for 150,000 trips per day as will Boston’s Green Line Extension for 52,000 trips. Looking at rider fares, New York loses a bit less than $1 per ride taken and L.A. loses over $2 per ride.
So, how will The Boring Company “do” underground transportation system building better than the traditional, money-heavy methods? To put it simply: Be efficient.
Building a better mouse snail trap
They’ve designed their tunneling machines to bore faster and more efficiently. While the first generation machine is conventional and named Godot after the Samuel Backett play, Waiting for Godot due to the length of time it took to understand the machine’s functionality and assemble it, two other improved generations will be part of the Boring family.
The second generation machine, named “Line-Storm” after a Robert Frost love poem with the same phrase in its title that’s about overcoming hardships, is a conventional boring machine that has been highly modified. It uses a redesigned cutting head that takes in significantly more dirt and is 2 times faster than Godot.
The third generation machine, named “Prufrock”, will be a ground-up, fully designed TBC machine that’s 15 times better than the next best boring system, and that means 15 times faster than the next best machine out there, period.
Improved construction practices and project management
During construction, TBC reinforced tunnel segments as they were dug, those reinforcements being created on-site out of materials comprising 70% of the dirt dug and the remaining 30% primarily cement. This recycled material, as-you-go system enabled quick construction with cost efficiency, the demo tunnel taking 2 years almost to the day from Musk’s initial Tweet that inspired the undertaking.
Function-focused engineering
TBC’s tunnels are smaller than the typical underground rail system because they’re designed for specific types of vehicles that are smaller than traditional transports (autonomous electrics) and don’t require extra space for maintenance. This in itself reduces costs by 3-4 times.
Although The Boring Company has the advantage of being the new kid on the block whose founder has a unique background in shaking up traditional systems, there may still be a few hangups that will never quite go away. Anything involving the general public, especially public transit, will have serious bureaucracy involved. To achieve the company’s mile-long demo track feat, it had to face the extreme regulatory environment of Los Angeles. California overall has earthquakes, is a methane zone, and has oil and gas fields, all which add to a long list of rules to be followed for any construction projects to commence. “The amount of paperwork we had to go through to do this was enormous,” Musk said at TBC’s recent event.
Additionally, a lawsuit filed last year by the Brentwood Residents Coalition and the Sunset Coalition objecting to the company’s Sepulveda tunnel eventually led to their abandonment of that leg of the demonstration project. The coalitions primarily alleged that TBC was skirting environmental review requirements by “chopping large projects into smaller pieces that taken individually appear to have no significant environmental impacts”, citing a conceptual map the company released showing its planned Los Angeles tunnel system. Musk hasn’t let these hurdles damage his confidence, however. While speaking with press at TBC’s opening event, he added his own spin to the Broadway mantra (and Frank Sinatra hit, “New York, New York”) about “making it” there : “If you can build a tunnel in L.A., you can build it anywhere.”
As CEO of an innovative electric car company and a commercial rocket company set on sending humans to Mars, Musk is known as an industry disruptor. Even if the cost of boring tunnels for public transportation projects rises somewhat above the $10 million per mile price demonstrated with the LA/Hawthorne tunnel, it will be still be well under the typical costs in the boring industry. It’s obvious already that a potential disruption is underway. “We have people hounding us to invest nonstop…it’s kinda ridiculous how much interest we’ve had in investing in Boring Company,” Musk stated at the tunnel unveiling. Steve Davis, president of the company, added that they receive “greater than 5 and less than 20 requests per week from different municipalities and stakeholders.”
Also in the works for the tunneling newcomers: A transport line connecting downtown Chicago to Chicago O’Hare International Airport. The company won a contract to build a transport system for the city’s fliers in June 2017, and ground breaking is planned for sometime in the next few months. The Boring Company’s calendar still includes plans for an “urban loop system” as well, an underground network of pod-type buses for pedestrians and cyclists connecting numerous points throughout city centers.
Tesla has reached a notable benchmark in its autonomous driving program after its Robotaxi fleet surpassed one million miles of unsupervised operation. The company made the announcement during its Cybercab event in Austin on September 3.
Tesla Vice President of AI Ashok Elluswamy told attendees he was happy to report the fleet had achieved one million miles of unsupervised Robotaxi operation as a testament to safety.
The new total marked a sharp increase from the 380,000 unsupervised miles Tesla disclosed during its second-quarter 2026 earnings update in late July.
In roughly six weeks, the company added about 620,000 miles. That acceleration followed Tesla’s decision to remove in-vehicle safety monitors from most of its operations outside the San Francisco Bay Area.
Credit: Tesla
Tesla first launched Robotaxi service in Austin in June 2025 with safety drivers present. It later began fully unsupervised rides and expanded into Dallas, Houston, Miami, Orlando, and Tampa. The San Francisco Bay Area remains the exception, where a safety monitor still rides in the vehicle under California permitting rules.
The company has not released a city-by-city breakdown of the one million unsupervised miles.
The milestone arrived as Tesla began offering public Cybercab rides in Austin. The purpose-built vehicle has no steering wheel or pedals and is designed only for autonomous ride-hailing. Production versions joined the existing fleet of modified Tesla vehicles already operating in the service.
Tesla’s unsupervised mileage is growing at a double-digit weekly rate according to earlier company comments, yet its fleet size remains modest compared with established competitors. Waymo has accumulated more than 200 million fully autonomous rider-only miles. Tesla has described its own unsupervised operations as having recorded zero notable incidents in the period leading up to the July update.
The one-million-mile figure reflects Tesla’s shift from supervised testing to broader driverless service in multiple states. It also highlights the company’s strategy of using both existing Model Y vehicles and the new Cybercab to scale its network.
Credit: Tesla
Whether the rapid recent growth continues will depend on further city expansions, regulatory approvals, and the performance of the purpose-built Cybercab in everyday paid rides. Tesla has not specified how many of the latest miles involved the new vehicle versus the rest of the fleet.
The announcement underscores Tesla’s progress toward a larger robotaxi network while illustrating the remaining gap in total autonomous experience relative to longer-operating rivals.
Tesla AI lead Ashok Elluswamy said this week that 24-hour Robotaxi service is close. Replying on X to a rider who wanted Cybercab trips all night, he wrote that the capability would arrive “next month or so” once “the next tech to merge on the v15 plan” is ready.
The comment landed on September 4, one day after Tesla opened public Cybercab rides in Austin. It is the clearest near-term timeline yet for overnight unsupervised operation. Tesla’s paid Robotaxi network currently runs from 6 a.m. to 10 p.m. seven days a week across Austin, Dallas, Houston, Miami, Orlando, and Tampa.
next month or so. the next tech to merge on the v15 plan will enable it.
— Ashok Elluswamy (@aelluswamy) September 4, 2026
That 16-hour window is shorter than the 6 a.m. to 2 a.m. schedule the company used for much of the prior year.
Elluswamy did not name the specific feature or say whether the change would apply first to purpose-built Cybercabs, the existing Model Y fleet, or both. He also offered no city-by-city rollout list. The link to Full Self-Driving v15 is nevertheless significant.
Tesla has described v15 as a step-change architecture with seven parallel improvement tracks and roughly ten times more parameters than earlier builds. Early versions of that software already operate on the Robotaxi fleet and contain about 40 percent of the planned gains.
By July 2026, the unsupervised fleet had logged more than 380,000 miles across six cities in two states with what the company called an impeccable safety record and no notable incidents caused by the vehicles themselves. Tesla has repeatedly argued that camera-based end-to-end neural networks, rather than extra sensors, are the core of the solution.
Overnight service would test that claim in lower-light conditions and would also raise vehicle utilization, a key variable for Robotaxi unit economics. The company has already begun using public Superchargers at night and is building dedicated Robotaxi charging sites.
Riders have asked why software must change if the cars already drive in the dark. The practical answer appears to be reliability and scale: Tesla has held back mass expansion until more of the v15 stack is merged, citing the need for higher confidence before putting thousands of unoccupied vehicles on streets around the clock.
If the next module arrives on the timetable Elluswamy sketched, 24-hour service could begin in October 2026 in at least some markets.
That would mark a shift from a daytime-bounded pilot to a service that can run whenever demand exists, including the late-night hours that have so far remained out of reach.
Tesla is beginning to roll out Full Self-Driving Supervised v14.3.9 with a new active safety layer that can take control even when the driver is operating the car manually.
Tesla AI said the software can activate FSD on the driver’s behalf when an imminent collision is detected and Automatic Emergency Braking may not be enough. It may also engage if the system detects heavy distraction or an accidental FSD disengagement.
FSD Supervised v14.3.9 starting to roll out shortly
This release includes a new active safety feature set: FSD Supervised can now activate on your behalf when an imminent collision is detected and Automatic Emergency Braking (AEB) may not be enough.
It may also engage if we…
— Tesla AI (@Tesla_AI) September 4, 2026
The capability is essentially Automatic Collision Evasion. However, unlike conventional AEB, which mainly applies the brakes in a straight line, this feature can use steering, braking, and acceleration together if the car calculates that stopping alone will not prevent impact and a safer path exists. The system may change lanes or move toward a shoulder when conditions allow, then continue driving after the immediate threat is handled rather than simply coming to a stop.
The intervention is meant as a last-resort safety net, not a replacement for attentive driving.
Tesla Full Self-Driving v14.3.7 early review: FSD saved me from an accident
Tesla’s own description still frames FSD as supervised assistance. Secondary reports on internal release notes say the feature can fire while the car is being driven manually if cabin-camera monitoring suggests the driver is not sufficiently attentive, such as reaching toward the back seat, or if FSD appears to have been turned off unintentionally.
After the emergency maneuver, the car is expected to alert the driver and request a return to manual control.
The safety case is straightforward. Many collisions happen in the last second because a driver is looking away, fumbles a control, or faces an obstacle that braking cannot fully solve. A system that can both recognize that AEB is insufficient and execute a coordinated evasive path can reduce those remaining high-severity events.
Re-engaging after accidental disengagement also addresses a practical failure mode: a small steering nudge that drops FSD at the worst moment. The advantage is a background safety net that uses the same vision stack already running in v14, instead of leaving the car solely to emergency braking once the driver is no longer in command.
The feature still depends on FSD being enabled and, according to reports, an active FSD purchase or subscription. It does not make the vehicle unsupervised. Drivers remain responsible, and Tesla has not published how often the system is expected to intervene or how it will handle false positives.
If the rollout is conservative and the false-alarm rate stays low, the update is a meaningful step: FSD is no longer only a feature the driver turns on. In the rare moments when disaster is already forming, it can step in.
Tesla crosses major Unsupervised Self-Driving milestone
Tesla Robotaxi will be a 24/7 service: here’s when
