The Brief Los Angeles drivers face another weekend of traffic delays as the 405 Freeway undergoes a construction project. Another round of nightmare 405 Freeway traffic kicks off this upcoming weekend for those looking to go in and out of Los Angeles' westside neighborhoods and the Sepulveda Pass. The Santa Monica Boulevard freeway entrance/exit and the Wilshire Boulevard freeway entrance/exit will all be closed over the weekend. During that same window, 405 Freeway south will also be reduced to three lanes between Sunset Boulevard and Wilshire Boulevard. Along that stretch, the Wilshire Boulevard freeway entrance/exit and Sunset Boulevard/Church Lane freeway entrances/exits will all be closed.