re los angeles freeway traffic reports in article c ulqn gpw fc hp com cfb fc hp com charlie brett writes while driving through the middle of nowhere i picked up knx am a clear channel station based in los angeles they had an ad claiming that they were able to get traffic flow information from all of the thousands of traffic sensors that caltrans has placed under the pavement does caltrans sell this info does knx have an exclusive what s the deal well they claim they are the only radio broadcaster with this information but the city s cable channel in cablevision areas shows this information map during travel times am and pm i believe most of the major la freeways are covered the computer generated map shows green yellow red or flashing red respectively mph mph mph and incident i might be off a little on the speeds since this is from memory i often look at this display in the morning to see if i really want to fight the traffic on the sepulveda pass or work from home for a little while to wait for it to clear another poster explained the origin of the information sensors embedded wire loops in the pavement near ramps and every half mile or so caltrans has had a big board driven from this data in their traffic control center for some time i don t know if they are selling the data or if anyone with the equipment necessary for its transmission and display can have it ed hall edhall rand org
