From WazeGPS1
It’s interesting and fascinating to watch this Los Angeles traffic animation and see how the trafic changes over the course of a day from 4PM to 4PM. Unless I am reading the info wrong, but it’s a bit unsettling to see no substantial police presence on the roads at times, for example between 8 PM and 9 PM, and between 1 AM and 6 AM.
source Flowing Data