Vertical Rails 1.12

summon falling_block ~ ~1 ~ {Block:stone,Time:1,Passengers:[{id:falling_block,Block:redstone_block,Time:1,Passengers:[{id:falling_block,Block:activator_rail,Time:1,Passengers:[{id:commandblock_minecart,Command:"gamerule commandBlockOutput false"},{id:commandblock_minecart,Command:"fill ~3 ~-2 ~ ~7 ~-2 ~1 chain_command_block 5"},{id:commandblock_minecart,Command:"setblock ~3 ~-2 ~1 chain_command_block 3"},{id:commandblock_minecart,Command:"fill ~7 ~-2 ~1 ~4 ~-2 ~1 chain_command_block 4"},{id:commandblock_minecart,Command:"setblock ~7 ~-2 ~ chain_command_block 3"},{id:commandblock_minecart,Command:"setblock ~3 ~-2 ~ repeating_command_block 5"},{id:commandblock_minecart,Command:"blockdata ~3 ~-2 ~1 {auto:1,Command:\"execute @e[tag=CMVR] ~ ~ ~ detect ~ ~ ~ ladder 5 entitydata @s {Motion:[-0.17,0.3,0.0]}\"}"},{id:commandblock_minecart,Command:"blockdata ~4 ~-2 ~1 {auto:1,Command:\"execute @e[tag=CMVR] ~ ~ ~ detect ~ ~ ~ ladder 4 entitydata @s {Motion:[0.17,0.3,0.0]}\"}"},{id:commandblock_minecart,Command:"blockdata ~5 ~-2 ~1 {auto:1,Command:\"execute @e[tag=CMVR] ~ ~ ~ detect ~ ~ ~ ladder 2 entitydata @s {Motion:[0.0,0.3,0.17]}\"}"},{id:commandblock_minecart,Command:"blockdata ~6 ~-2 ~1 {auto:1,Command:\"execute @e[tag=CMVR] ~ ~ ~ detect ~ ~ ~ ladder 3 entitydata @s {Motion:[0.0,0.3,-0.17]}\"}"},{id:commandblock_minecart,Command:"blockdata ~7 ~-2 ~1 {auto:1,Command:\"scoreboard players tag @e[type=tnt_minecart] add CMVR\"}"},{id:commandblock_minecart,Command:"blockdata ~7 ~-2 ~ {auto:1,Command:\"scoreboard players tag @e[type=hopper_minecart] add CMVR\"}"},{id:commandblock_minecart,Command:"blockdata ~6 ~-2 ~ {auto:1,Command:\"scoreboard players tag @e[type=furnace_minecart] add CMVR\"}"},{id:commandblock_minecart,Command:"blockdata ~5 ~-2 ~ {auto:1,Command:\"scoreboard players tag @e[type=chest_minecart] add CMVR\"}"},{id:commandblock_minecart,Command:"blockdata ~4 ~-2 ~ {auto:1,Command:\"scoreboard players tag @e[type=minecart] add CMVR\"}"},{id:commandblock_minecart,Command:"blockdata ~3 ~-2 ~ {auto:1,Command:\"Vertical Rails\"}"},{id:commandblock_minecart,Command:"setblock ~ ~ ~1 command_block 0 0 {Command:\"fill ~ ~-3 ~-1 ~ ~ ~ air\"}"},{id:commandblock_minecart,Command:"setblock ~ ~-1 ~1 redstone_block"},{id:commandblock_minecart,Command:"kill @e[type=commandblock_minecart,r=1]"}]}]}]}