Complex sentence: Metrolinx is the brand name of the Greater Toronto Transportation Authority (GTTA), the public authority that manages transportation planning including public transport within the Greater Toronto Area and Hamilton in the province of Ontario, Canada.
Split into simpler sentences: Metrolinx is the name under which the Greater Toronto Transportation Authority (GTTA) conducts business. The GTTA is the public authority that manages transportation planning including public transport within the Greater Toronto Area and Hamilton in the province of Ontario, Canada.