Complex sentence: Shortly thereafter, County Route S16 widens to four lanes as it reaches the city limits of Temecula as Pechanga Parkway, just before passing the Pechanga Resort & Casino.
Split into simpler sentences: Shortly thereafter, County Route S16 widens to four lanes as it reaches the city limits of Temecula. The route eventually becomes Pechanga Parkway, just before passing the Pechanga Resort & Casino.