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About product and suppliers:
        Alibaba.com offers 1,317 road blocker products. About 62% of these are traffic barrier, 3% are other roadway products, and 1% are flower pots & planters. 

A wide variety of road blocker options are available to you, such as free samples, paid samples. 

There are 1,317 road blocker suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of road blocker respectively. 

Road blocker products are most popular in Africa, Southeast Asia, and Domestic Market. 

You can ensure product safety by selecting from certified suppliers, including 570 with ISO9001, 63 with Other, and 43 with ISO14001 certification.