I planted horizontal junipers on a slope along my driveway 20 years ago. There were 3 varieties, Bar Harbor, Blue Rug and something-or-other. I also mulched heavily with bark chips. Over time, the junipers have grown down the slope. Now all the green areas are along the edge of the drive, and the upper slope is a tangle of bare dead-looking branches.I've noticed that some of the branches at the bottom of the slope have small roots

Can I cut these rooted branches and plant them higher on the slope and have them live?

Also, if I severely prune the junipers, will new branches sprout from the main root section? Or, should I just pull them out and replant either with my cuttings or bite the bullet and buy new ones?

Any advise would help. Thanks.