The 4K broadcast this year is much improved from the last NASCAR race that aired two years ago at Martinsville. It appears 4K cameras were used this time, except for the bumper/roof cams. The distance shots are mediocre as usual for 4K, but the closer shots (including being at nighttime) were really good, noticeably better than regular HD (not that HD is poor on DTV). I like the run down the pits with Truex and others on 4K, while 219 was doing commercial breaks. There were no commercials the entire 4K broadcast. Hopefully there’s more 4K races on FS1 before it switches to the other network in June.