Complex sentence: By the early 1990s the Traffic Safety Service completed the consolidation and in 1992 was itself absorbed into the New Zealand Police, which now has primary responsibilty for road traffic enforcement in New Zealand.
Split into simpler sentences: By the early 1990s the Traffic Safety Service has completed the consolidation and itself was absorbed into the New Zealand Police in 1992. The New Zealand Police now has responsibilty for all road traffic enforcement in New Zealand.