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Construction began today on the first true high-speed rail line in the US, which will connect Los Angeles suburbanites to the bright lights of Las Vegas, Nevada. Not only should the project enable people in the US to finally experience European and Asian standards of speedy passenger trains, it could also offer a commercial model for building high-speed rail lines elsewhere in the US.

A groundbreaking ceremony today in Las Vegas, attended by US Secretary of Transportation Pete Buttigieg alongside Nevada and California state officials, marked the official start of construction for the Brightline West project. With a targeted completion in four years – just in time for the 2028 Summer Olympics in Los Angeles – Brightline West is expected to whisk passengers at speeds of up to 320 kilometres per hour down the median of the Interstate 15 highway, bypassing lines of cars stuck in weekend traffic jams.

The $12 billion project may seem like a bold gamble for Brightline and its owner, Fortress Investment Group, even with a $3 billion federal grant announced by President Joe Biden back in December 2023. But there are several reasons why Brightline West may succeed where other US high-speed rail projects have fallen behind.

Brightline is focused on connecting major markets separated by about 400 to 550 kilometres, according to a by the infrastructure consultancy AECOM. That represents a sweet spot where high-speed rail is very competitive with driving and flying. The 350-kilometre Brightline West trip from Las Vegas to the Los Angeles suburbs is supposed to take just over 2 hours – representing an attractive alternative to the 4-hour drive that 50 million people travelling between the cities make each year.

“High-speed rail has been proven to be a very efficient way to move a high volume of passengers within a median distance,” says at the University of Texas at Austin. “There’s a market there with many successful examples in European countries and Asian countries that have proven you can make a profit in high-speed rail operations.”

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Another factor in Brightline’s favour is that it leased access from Nevada and California to build Brightline West through the existing Interstate 15 corridor. That bypasses the typical costs and delays involved in obtaining rights of way and acquiring land.

A reduced risk of delay can also keep overall project costs down over time. California’s own high-speed rail project, which was first approved by voters in 2008 to link San Francisco to Los Angeles, has seen estimated skyrocket from $33 billion to $128 billion. Other high-speed rail projects are currently being considered for Texas and the Pacific Northwest.

“Time is not your friend if you’re talking about preparing for or going through with construction [because of] inflation,” says at the University of Washington in Seattle. “These projects are so large that they are like implementing multiple mega projects that are all dependent on each other for successful completion.”

One lesson that US state rail authorities could learn from Brightline is to “value the cost of delay and indecision” by avoiding a lengthy planning phase, says , global transit director at AECOM. And although Brightline’s approach focuses only on the most potentially profitable routes, he suggests that government funding can fill the gap for other cases.

“The public purse can be used for those projects that are still needed to connect city pairs that are a little bit too close together for airline travel and too far apart for cars,” says Jackson.