Better minecart

You will be able to chain 8 minecarts at once which makes sense and instead going in the speed of 8 blps (8 blocks per second) you could control the speed and a new speedometer would replace the XP bar which the limit is 50 blps and if you press ctrl + a it will set autopilot which it moves in the same speed forever to exit autopilot you should again press ctrl + a to exit auto and another feature is the copper rail. Copper rails will be crafted with 1 rail, 1 redstone dust, 1 piston and 6 copper ingots, it will be used to increase or decrease the speed without any pilot and if your point points at the copper rail it will show disabled after being placed and right click it and it will show numbers which is the speed it pushes the minecart to the set speed and left click it to decrease the speed but if a minecart comes to a disabled copper rail it stops without the pilot doing it and it could be powered by a redstone signal to turn back to it's last pushed speed number