(CNN) — High speed trains have proved their worth across the world over the past 50 years.

It's not just in reducing journey times, but more importantly, it's in driving economic growth, creating jobs, and bringing communities closer together. China, Japan, and Europe lead the way.

So why doesn't the United States have a high-speed rail network like those?

For the richest and most economically successful nation on the planet, with an increasingly urbanized population of more than 300 million, it's a position that is becoming more difficult to justify.

Although Japan started the trend with its Shinkansen "Bullet Trains" in 1964, it was the advent of France's TGV in the early 1980s that really kick-started a global high-speed train revolution that continues to gather pace.

High-speed train revolution

But it's a revolution that has so far bypassed the United States. Americans are still almost entirely reliant on congested highways or the headache-inducing stress of an airport and airline network prone to meltdowns.

China has built around 26,000 miles (42,000 kilometers) of dedicated high-speed railways since 2008 and plans to top 43,000 miles (70,000 kilometers) by 2035.

Meanwhile, the United States has just 375 route-miles of track cleared for operation at more than 100 mph.

"Many Americans have no concept of high-speed rail and fail to see its value. They are hopelessly stuck with a highway and airline mindset," says William C. Vantuono, editor-in-chief of Railway Age, North America's oldest railroad industry publication.

Cars and airliners have dominated long-distance travel in the United States since the 1950s, rapidly usurping a network of luxurious passenger trains with evocative names such as "The Empire Builder," "Super Chief" and "Silver Comet."

Deserted by Hollywood movie stars and business travelers, famous railroads such as the New York Central were largely bankrupt by the early 1970s, handing over their loss-making trains to Amtrak, the national passenger train operator founded in 1971.

In the decades since that traumatic retrenchment, US freight railroads have largely flourished Passenger rail seems to have been a very low priority for US lawmakers.

Powerful airline, oil and auto industry lobbies in Washington have spent millions maintaining that superiority, but their position is weakening in the face of environmental concerns and worsening congestion.

Billions for rail improvements

US President Joe Biden's $1.2 trillion infrastructure bill includes an unprecedented $170 billion for improving railroads.

Some of this will be invested in repairing Amtrak's crumbling Northeast Corridor (NEC) linking Boston, New York, and Washington.

There are also big plans to bring passenger trains back to many more cities across the nation — providing fast, sustainable travel to cities and regions that have not seen a passenger train for decades.

Add to this the success of the privately funded Brightline operation in Florida, which has been given the green light to build a $10 billion high-speed rail link between Los Angeles and Las Vegas by 2027, plus schemes in California, Texas and the proposed Cascadia route linking Portland, Oregon, with Seattle and Vancouver, and the United States at last appears to be on the cusp of a passenger rail revolution.

Bigger investment

"Every president since Ronald Reagan has talked about the pressing need to improve infrastructure across the USA, but they've always had other, bigger priorities to deal with," says Scott Sherin, chief commercial officer of train builder Alstom's US division.

"But now there's a huge impetus to get things moving — it's a time of optimism. If we build it, they will come. As an industry, we're maturing, and we're ready to take the next step. It's time to focus on passenger rail."

Sherin points out that other public services such as highways and airports are "massively subsidized," so there shouldn't be an issue with doing the same for rail.

"We need to do a better job of articulating the benefits of high-speed rail — high-quality jobs, economic stimulus, better connectivity than airlines — and that will help us to build bipartisan support," he adds. "High-speed rail is not the solution for everything, but it has its place."

Only Amtrak's Northeast Corridor has trains that can travel at speeds approaching those of the 300 kilometers per hour (186 mph) TGV and Shinkansen.

Even here, Amtrak Acela trains currently max out at 150 mph — and only in short bursts. Maximum speeds elsewhere are closer to 100 mph on congested tracks shared with commuter and freight trains.

New generation of trains

This year, Amtrak plans to introduce its new generation Avelia Liberty trains to replace the life-expired Acelas on the NEC.

Capable of reaching 220 mph (although they'll be limited to 160 mph on the NEC), the trains will bring Alstom's latest high-speed rail technology to North America.

The locomotives at each end — known as power cars — are close relatives of the next generation TGV-M trains, scheduled to debut in France in 2024.

Sitting between the power cars are the passenger vehicles, which use Alstom's Tiltronix technology to run faster through curves by tilting their bodies, much like a MotoGP rider does. And it's not just travelers who will benefit.

"When Amtrak awarded the contract to Alstom in 2015 to 2016, the company had around 200 employees in Hornell," says Shawn D. Hogan, former mayor of the city of Hornell in New York state.

"That figure is now nearer 900, with hiring continuing at a fast pace. I calculate that there has been a total public/private investment of more than $269 million in our city since 2016, including a new hotel, a state-of-the-art hospital and housing developments.

"It is a transformative economic development project that is basically unheard of in rural America and if it can happen here, it can happen throughout the United States."

Alstom has spent almost $600 million on building a US supply chain for its high-speed trains — more than 80 percent of the train is made in the United States, with 170 suppliers across 27 states.

"High-speed rail is already here. Avelia Liberty was designed jointly with our European colleagues, so we have what we need for 'TGV-USA'," adds Sherin.

"It's all proven tech from existing trains. We're ready to go when the infrastructure arrives."

And those new lines could arrive sooner than you might think.

Incoming high-speed lines

In March, Brightline confirmed plans to begin construction on a 218-mile (351-kilometer) high-speed line between Rancho Cucamonga, near Los Angeles, and Las Vegas, carving a path through the San Bernardino Mountains and across the desert, following the Interstate 15 corridor.

The 200 mph line will slash times to little more than one hour — a massive advantage over the four-hour average by car or five to seven hours by bus — when it opens in 2027.

Mike Reininger, CEO of Brightline Holdings, says: "As the most shovel-ready high-speed rail project in the United States, we are one step closer to leveling the playing field against transit and infrastructure projects around the world, and we are proud to be using America's most skilled workers to get there."

Brightline West expects to inject around $10 billion worth of benefits into the region's economy, creating about 35,000 construction jobs, as well as 1,000 permanent jobs in maintenance, operations and customer service in Southern California and Nevada.

It will also mark the return of passenger trains to Las Vegas after a 30-year hiatus — Amtrak canceled its "Desert Wind" route in 1997.

Brightline hopes to attract around 12 million of the 50 million one-way trips taken annually between Las Vegas and LA, 85 percent of which are taken by bus or car.

Another California project

Meanwhile, construction is progressing on another high-speed line through the San Joaquin Valley.

Set to open around 2030, California High Speed Rail (CHSR) will run from Merced to Bakersfield (171 miles) at speeds of up to 220 mph.

Coupled with proposed upgrades to commuter rail lines at either end, this project could eventually allow high-speed trains to run the 350 miles (560 kilometers) between Los Angeles to San Francisco metropolitan areas in just two hours and 40 minutes.

CHSR has been on the table as far back as 1996, but its implementation has been controversial.

Disagreements over the route, management issues, delays in land acquisition and construction, cost over-runs and inadequate funding for completing the entire system have plagued the project — despite the economic benefits it will deliver as well as reducing pollution and congestion. Around 10,000 people are already employed on the project.

Costing $63 billion to $98 billion, depending on the final extent of the scheme, CHSR is to connect six of the 10 largest cities in the state and provide the same capacity as 4,200 miles of new highway lanes, 91 additional airport gates and two new airport runways costing between $122 billion and $199 billion.

With California's population expected to grow to more than 45 million by 2050, high-speed rail offers the best value solution to keep the state from grinding to a smoggy halt.

Corridors for the greatest potential

Brightline West and CHSR offer templates for the future expansion of high-speed rail in North America.

By focusing on pairs of cities or regions that are too close for air travel and too far apart for car drivers, transportation planners can predict which corridors offer the greatest potential.

"It's logical that the US hasn't yet developed a nationwide high-speed network," says Sherin. "For decades, traveling by car wasn't a hardship, but as highway congestion gets worse, we've reached a stage where we should start looking more seriously at the alternatives.

"The magic numbers are centers of population with around three million people that are 200 to 500 miles apart, giving a trip time of less than three hours — preferably two hours.

"Where those conditions apply in Europe and Asia, high-speed rail reduces air's share of the market from 100 percent to near zero. The model would work just as well in the USA as it does globally."

Pipe dream?

Sherin points to the success of the original generation of Acela trains as evidence of this.

"When the first generation Acela trains started running between New York City and Washington in 2000, Amtrak attracted so many travelers that the airlines stopped running their frequent 'shuttles' between the two cities," he adds.

However, industry observer Vantuono is more pessimistic.

"A US high-speed rail network is a pipe dream," he says. "A lack of political support and federal financial support combined with the kind of fierce landowner opposition that CHSR has faced in California means that the challenges for new high-speed projects are enormous."

According to the International Energy Agency (IEA), urban and high-speed rail hold "major promise to unlock substantial benefits" in reducing global transport emissions.

Dr. Fatih Birol, the IEA's executive director, argues that rail transport is "often neglected" in public debates about future transport systems — and this is especially true in North America.

"Despite the advent of cars and airplanes, rail of all types has continued to evolve and thrive," adds Birol.

Globally, around three-quarters of rail passenger movements are made on electric-powered vehicles, putting the mode in a unique position to take advantage of the rise in renewable energy over the coming decades.

Here, too, the United States lags far behind the rest of the world, with electrification almost unheard of away from the NEC.

Rail networks in South Korea, Japan, Europe, China and Russia are more than 60 percent electrified, according to IEA figures, the highest share of track electrification being South Korea at around 85 percent.

In North America, on the other hand, less than 5 percent of rail routes are electrified.

The enormous size of the United States and its widely dispersed population mitigates against the creation of a single, unified network of the type being built in China and proposed for Europe.

Air travel is likely to remain the preferred option for transcontinental journeys that can be more than 3,000 miles (around 4,828 kilometers).

But there are many shorter inter-city travel corridors where high-speed rail, or a combination of new infrastructure and upgraded railroad tracks or tilting trains, could eventually provide an unbeatable alternative to air travel and highways.

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