https://joy.videvo.net/videvo_files/video/free/2018-11/large_watermarked/181015_06_FourLevel_14_preview.mp4 Aerial Shot of Four Level Interchange LA Flying past the Four Level Interchange (Bill Keene Memorial interchange), downtown Los Angeles. 1080paerialBill KeenebusycarscitycongestedcongestiondowntowndronefreewayhighwayindustrialindustryinfrastructureinterchangeintersectionjunctionLALos Angelesroadroadstradetraffictransportationtravel