A Japanese company said its magnetic levitation train set a speed record this week, reaching 589 km/h on a test track.

The Central Japan Railway Co., often called JR Central, said the test run involved a seven-car magnetic-levitation train on a 42.8-km track in Japan’s Yamanashi prefecture. The company said it hopes to break the speed record again on Tuesday.

Magnetic-levitation, or maglev, train systems use magnets to lift and propel the train, promising a ride that’s smoother, quieter and nearly twice as fast as traditional high-speed rail.

JR Central set the previous maglev train speed record of 581 km/h on the same track in December 2003, according to the company.

Japanese officials plan to open a maglev line between Tokyo and Nagoya in 2027, cutting the 90-minute travel time between the two cities on a traditional high-speed rail line by more than half.

Because maglev trains require straight, even and predictable terrain to run smoothly, most of the route will be through tunnels.

“It’s good news, obviously, that the technology keeps advancing, and that countries are focusing on this,” said Andy Kunz, president of the U.S. High Speed Rail Association. “We consider high-speed rail the future, no question — from energy use, to being able to move large numbers of people quickly, to climate solutions.”

Yet Kunz said maglev trains are expensive, power-intensive and potentially unsafe.

“The problem is, if you have one tiny little settling of the earth — which happens all the time because of plate tectonics — that can create little movements in the maglev system, which can send trains crashing into stuff,” he said. “It’s a very difficult system to make operational.”

Germany discontinued a high-profile maglev program after a fatal collision on a test course killed 23 people in 2006.

“We support advances in rail and technology,” Kunz said. “But what we really support is technology that’s proven. We can talk about maglev and the Hyperloop, all these things that aren’t proven, then spend 20 years hoping they’ll get built.

“But meanwhile, we need good, fast rail today.”

Japanese Prime Minister Shinzo Abe will visit the U.S. for a week beginning April 26 and high-speed rail-related talks probably will be on his schedule.

JR Central is promoting maglev technology in the U.S. for a line between Washington and Baltimore, which could reduce travel time between the two cities to 15 minutes.

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Early last year, Abe suggested to President Barack Obama that Japan would foot half of the $10 billion cost of the project.

Meanwhile, California’s $68-billion, high-speed rail project, which is to connect Los Angeles with San Francisco by 2029, broke ground in January.

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