Complex sentence: The New York City Transit Authority is the launch customer for this configuration; previously, 20 transit-style buses in the LeMirage predecessor model had been built for GO Transit in the late 1990s.
Split into simpler sentences: The New York City Transit Authority is the launch customer for this configuration. Previously, 20 transit-style buses in the LeMirage predecessor model had been built for GO Transit in the late 1990s.