The longest, largest, and fastest maglev train in the world, situated at the Yamanashi test track in Japan, has restarted public testing. The test track has recently been extended to 42.8 kilometers (26.5 miles), allowing for a five-car prototype train to be routinely pulled at speeds of over 500 kph (310 mph). The train accelerates to max speed in under three miles, and according to the Japanese journalists the ride is very smooth. On the inside, anyway: Externally, according to one journalist, the L0 Series train created "a shock wave and a massive gust of wind ... a deafening sound that made conversation all but impossible" as it passed by at 310 mph.