Full directional night-time closures of 405 over Sepulveda Pass expected to begin Tuesday night by LA Metro , November 28, 2011 Here is the construction notice from the I-405 Sepulveda Pass Improvements Project team: Click above for a larger version of the notice. Categories: Service Alerts Tagged as: 405 closures, I-405 Sepulveda Pass Improvements Project, Mulholland Bridge