Complex sentence: Despite the duplicate service, Metro considers the redundant bus service justified as both bus routes, which run frequently, operate from Downtown Los Angeles along the "entire" Wilshire corridor (unlike the Purple Line) west to Beverly Hills, Westwood and Santa Monica.
Split into simpler sentences: Despite the duplicate service, Metro considers the redundant bus service justified because both bus routes run frequently from Downtown Los Angeles. Unlike the Purple Line, they run along the "entire" Wilshire corridor, west to Beverly Hills, Westwood and Santa Monica.