Great ride with amazing ending!

The day before my birthday, I had this great ride on Lady, with an amazing ending! A wonderful fall day, about 70 degrees, with a cool breeze. Lady and I went down the trail to the woods, and went further inside the woods than we have yet this year. She seemed calm and I am enjoying our rides more and more. She did everything I asked, without a problem. Very pleased after our ride, I rode back to the car, asked her to stretch out and dismounted. As I was lifting the saddle from her back, I heard the truck coming down the road. Lady heard it too. She stood at attention, her ears forward, eyes on that truck coming down Kelly Road toward us. I threw the saddle and pad quickly into the car trunk, so I could be ready to hold Lady. I was sure the truck would turn in before it got to us, but it went past that driveway and was still coming. It was almost to the stable driveway, and we were standing on the edge of the road! I led Lady onto the grass, just near the front of our car, and turned her, ready for whatever she would do. She stood there, eyes on the truck as it passed within 15 feet of us, but she didn't move. This big grain truck, heading for a field past the stable, passed us and went on. Lady stood there, looking. I suddenly realized how close the big truck seemed, and yet Lady showed no sign of bolting. I still feel the wonder of it, after seven years of being afraid of Lady's fear of trucks--a fear which had become a huge monster within me--and now she stood there as this truck went by. I've told her before not to be afraid of trucks and tractors, that they come by on their way to working in fields. We will get out of their way and they will go on by and we would be safe. Did she really understand? Has she learned to trust me? It may seem like a small thing, but it isn't. It is like a miracle, and I am in awe!