Difficult for traffic to get around.
The item id for Tanktrap in unturned is 1227. You can use this ID with the commands below to spawn the item, give it to a player or buy it on a modded economy server.
Useable: Barricade
Build: Barricade
Size_X: 1
Size_Y: 1
Size_Z: 0.25
Health: 250
Range: 4
Radius: 0.4
Offset: 0.5
Explosion: 35
Blueprints: 1
Blueprint_0_Type: Barricade
Blueprint_0_Supply_0_ID: 285
Blueprint_0_Supply_0_Amount: 7
Blueprint_0_Tool: 76
Blueprint_0_Build: 27
Armor_Tier: High
PlacementAudioClip: Sounds/MetalPlacement.mp3
Has_Clip_Prefab: false