On the surface, it seems ridiculous. It doesn't matter. It works for me. Especially when trying to find a 
customer that I have never been to before. That last few minutes before reaching that new customer's dock isn't easy. You can drive 1,000 miles and that last mile is always the hardest. When you're in a strange area, your best equipment is you.
It is not just the radio that I turn off. I turn off my truck navigational device as well. At that point I rely on my own senses. Having a navigational device can be deceiving. They are doing exactly what you asked them to do. They are finding an address. You are not delivering to an address. You are delivering to a dock. That is where you come in.
It is a lot easier than it used to be. We did not have navigational devices. We had maps. We had 
directions That were good – sometimes. There were times when I parked the truck near the delivery address and walked, until I figured out how and where I was supposed to be. That old method still works. Getting a visual on a driveway or a loading area is helpful. It lets you scope out the area. I don't want to have a picture of my truck on the internet stuck part way in a ditch because I turned in the wrong driveway. The one that leads to the address. The one that I programmed into my GPS.
Use a combination of technology and old school. Use technology, but don't rely on it. Getting an actual visual can save you a lot of grief. So can technology. Here is a great example. I was hauling a multi stop meat load from Green Bay into the Chicago area. I phoned my first stop in Itasca, IL to see if I could camp there over night. They said that I could park in the dock. It was a sealed reefer load. So, I planned to back in close to the dock and open the doors in the morning. Then, I looked at the satellite map. They were located on a circular road off of IL 53 in 
Itasca, IL. I programmed the address into my navigational device and left for my customer.
As I approached the street that I was looking for, my GPS was telling me to turn onto the street. I waited to turn into the second entrance to the road. The satellite imaging showed me that this would put the dock on the left side. Looking at the satellite map saved me from having to blind side in. As I turned onto the street, I turned off the GPS. It had done its job and found the street. My job is to get it into the dock. I parked the truck on the street and walked around the dock area, looking for hazards and the easiest way to do things. Always look for the easiest way. It is almost always the safest way. Use technology and your brain to make your job as safe and easy as you can.