You must have TABLE LAMP and LADDER to make TRAFFIC BARRICADE. You can find this item in misc blocks category. Plant it and come back tomorrow, unless you want to spent ridiculous amount of spray. Breaking this block will give you 11 experience points. There is no data about durability. Unfortunaltely seedratio information is not available. Currently we do not yet have knowledge about the gemratio of TRAFFIC BARRICADE. Unfortunaltely blockratio information is not available.