A new train for the busy Washington to Boston route has finally passed a computer modeling test and is set for tryouts on the tracks. Amtrak has no date yet for when it can carry passengers.

Amtrak officials said late Friday that the new trains, which had failed an extended series of computer modeling tests, had passed on the 14th try and had been cleared by the Federal Railroad Administration to begin testing on the tracks that run from Washington, D.C., to Boston.