My phone GPS tells me when to turn in advance. I don't have to look at anything. Whatever GPS system you like to use, I believe they are all much better than any CB radio. It's funny how all the phones in peoples cars are hooked up to big brother and they know almost instantly when traffic slows down. Phones are everywhere and there is that much data at every second of the day. You can't say that about CB radios.
But hey, that is just me. Accept all the data out there and make your own decision if you turn left or right.
I ran into an issue with just relying on the phone on I-29 three times in the Omaha/Council Bluffs area and I-70 in Indianapolis - google maps did not know I-29 was completely shut down in both directions on two trips and kept turning me to get back on I-29 when it was closed. Following truckers wasn't an option because who knows where there ultimate destination was. I had to rely on state road signs and the instructions were different northbound and southbound. It also bit me in Indianapolis where I-70 East was closed for major construction and the re-route signs simply disappeared after the one telling me to take I-465 West to I-65 north to Chicago (WHAT????). I decided to go I-465 East and pick up I-70 (which was shut down in downtown) except the entrance back on to I-70E was closed due to construction. I might still be circling I-465 if I hadn't pulled off an exit, found a parking lot and actually looked at my truckers map. My conclusion was that Google Maps may know about accidents and temp construction but isn't necessarily in sync with the state DOTs on long term construction.