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About product and suppliers:
        Alibaba.com offers 1,216 road blocker products. About 62% of these are traffic barrier, 1% are access control system, and 1% are other police & military supplies. 

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

There are 1,216 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 Southeast Asia, Africa, and Mid East. 

You can ensure product safety by selecting from certified suppliers, including 528 with ISO9001, 59 with Other, and 38 with OHSAS18001 certification.