How to get and use a sign

How to get a sign: Give yourself a nether brick with the specific Custom Model Data. For example if you wanna get a Stop sign (ID: 51) then you should use this command: /give <player> minecraft:nether_brick{CustomModelData:51} You can check the number of the Custom Model Data at below.

How to use the signs: First of all you need a small (baby) armorstand. I prefer using this plugin to create and edit armorstands: https://www.spigotmc.org/resources/armor-stand-tools.2237/ Then you need to put a column into the armorstand's head. Column: /give <player> minecraft:brick{CustomModelData:1} Then you have to get the signs and put them into the armorstand's arms.