Powered Rails are a block that can decrease or increase speed of moving Minecarts, which they will do if provided with a Redstone signal.
It was added as a response to the minecart booster bug, which was fixed with the release of Beta 1.6. Powered Rails cannot be curved like Rails, which limits their usefulness. Powered Rails will launch different types of Minecarts different distances depending on the amount of stuff they're holding. Unpowered Powered Rails can be used as brakes, as they will quickly completely stop Minecarts that hit them. As of 1.8, too many Powered Rails on a track may increase the Player to a speed at which they will derail if they go around a bend, introducing the necessity for a slowdown time.
|Mobs||Horse • Pig|
|Minecarts||Minecart • Minecart with Furnace • Minecart with Chest • Minecart with Hopper • Minecart with TNT • Minecart with Command Block • Boat|
|Rails||Rail • Powered Rail • Detector Rail • Activator Rail|
|Miscellaneous||Carrot on a Stick • Saddle|