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About product and suppliers:
        Alibaba.com offers 1,400 road blocker products. About 61% of these are traffic barrier, 17% are traffic cone, and 1% are access control system. 

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

There are 1,369 road blocker suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Turkey, and United States, which supply 91%, 2%, and 1% of road blocker respectively. 

Road blocker products are most popular in Southeast Asia, Africa, and Mid East. 

You can ensure product safety by selecting from certified suppliers, including 570 with ISO9001, 69 with Other, and 49 with ISO14001 certification.