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Access control is often a system enabling authorities to control use of areas and resources inside a given physical facility or computer-based information system. Access control is, actually, a typical, everyday phenomenon. For example, a lock on the car door is essentially a kind of access control. The PIN over a bank's ATM method is another way of access control. Even nightclub bouncers, standing in front of your door, are another illustration of (perhaps) a much more primitive mode of access control. Using an access control mechanism is essential when persons seek to secure confidential, important, or sensitive information and equipment.
Designed by Shandong High Speed Croup, the construction was entered December 2006 and finished in December 2010, after 14 a lot of planning researches since 1993, which employed 30,000 workers to develop, and used 450,000 plenty of steel and 2.3 million cubic meters of concrete, having a total investment of approximately 9 billion yuan. The open of the bridge will decrease traffic time from Qingdao to Huangdao District by at the very least 20 minutes and release pressure for the Jiaozhou Bay Expressway. Furthermore, the Qingdao Haiwan Bridge is the starting section of national expressway from Qingdao to Lanzhou and the key part of high way net of Shandong.
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