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About product and suppliers:
        Alibaba.com offers 1,255 road blocker products. About 61% of these are traffic barrier, 5% are speed bump, and 1% are access control system. 

A wide variety of road blocker options are available to you, such as plastic, aluminum, and metal. You can also choose from hydraulic power units, hydraulic accumulators, and carport. As well as from automatic, retractable. And whether road blocker is ip66, or ip65. 

There are 1,255 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 559 with ISO9001, 69 with Other, and 48 with ISO14001 certification.