They don't have traffic radio stations in LA?
They do have traffic reports on local radio stations. They will tell me there is a problem on the 5.
What they won't tell me is if it will be faster for me to take the 210 to the 71 to the 91, or the 210 to the 15 to the 91, or the 10 to the 71 to the 91, or the 10 to the 15 to the 91, or the 60 to the 71 to the 91, or the 60 to the 15 to the 91...
Or the 10 to the 605 to the 91, or the 60 to the 605 to the 91, or the 210 to the 605 to the 10 to the 71 to the 91...and I can go on.
That's what I have to navigate on a regular basis, and anyone who lives in the Los Angeles area will tell you that the traffic alerts on the radio are at best barely useful. You can be sitting in dead stop traffic for 30 minutes and not have a single mention of what the problem is. If I have my navigation on I can see exactly where the problem is and how long it is is likely to last. I can see if it is worth trying an alternate route or waiting.
Navigation is a tool for me, like a hammer or a saw. I use that tool to get me home sooner, so I can spend more time with my family.