【正文】 s unit eight four form , use shell unit simulation of the part that may be contacted with the semirigid guardrail on the automobile, other parts adopt entity39。 The concrete guardrail is suitable for very dangerous stepping such highway sections as the river bridge , cliff ,etc.。 2)The guardrail should be able to make the vehicle reply to and stop travel direction frequently 。s own structure rigidity is great, not only the ability to absorb energy is low, but also apt to cause two accidents. The semirigid guardrail is a kind of continuous roof beam post type guardrail structure, because there are certain rigidity and flexibility, have certain energy absorbability , but lighten the injury to the passenger and vehicle greatly , so already widely applied to the highway engineering. The roof beam guardrail of the wave form is a main form of the semirigid guardrail , carry on research of performance and energy absorbability of safe protection to it, will play a instructing role to the construction of the expressway of mountain area , will offer the theoretical foundation for some designs of posite guardrail . Improve the environmental quality of the underground space and ventilation result, offer the fortable environment of going by bus to passenger, offer the good condition of work to station equipment and staff member , make the underground environment get effective control. Satisfied when the fire accident happens in the station or the annex, arrange cigarettes and ventilate effectively, guarantee passenger39。s own since contact , position and area are in changing contact each other), then influence the size and direction exposed to strength and frictional force , influence the sport orbit of the automobile, this kind feedback function make automobile semirigid guardrail collide system strike shape at specific coupling each other. Now, people collide structure basic principle of dynamics apply other relevant field, including the study on semirigid guardrail , but the restriction that divided because of the speciality, in design technical research of the semirigid guardrail , have not made breakthrough progress yet. Through the response characteristic analysis of the human body in the car in the course to colliding, is it collide course various kinds of sport law that automobile might appear human body bludgon the influence law responded into to car to find out, confirm in view of the above that it is most favorable to human body39。ROADGUARD BARRIER SYSTEM The roadguard barrier, 6 feet long, feet high, 2 feet wide at base, with its patented design, is the only barrier of its type that self locks without the need for additional assistance. No barrier, other than the roadguard barrier, can selflock without the need of additional apparatus, such as a cable, strap, rod or coupler. In addition, the roadguard barrier, because of its unique patented design allows for curved configurations of up to 15 degrees at each barrier connection, in either direction, while remaining locked to the adjacent barrier. No other barrier can make that claim! Also, the roadguard barrier is designed for the addition of signs screens and flashers because of the built in slots for such devises and is easier to maneuver because of its weight and two carrying slots contained in each barrier. The patented interior design of the roadguard barrier prevents bulging and keeps its side’s straight and trim while maintaining a weight of only 125 lbs. Empty but a secure 1675 lbs. The roadguard corner connector barrier is designed for use with the roadguard barrier as a connecting barrier unit to allow for either left or right angle turns, or both simultaneously, of between 75 to 105 degrees while locking together all connecting barriers. In addition, the corner connector barrier allows for the initial roadguard barrier line to continue after connecting barrier line extensions to the left and/or the right. Lightweight and easy to handle, the roadguard corner connector barrier is 2 feet in length and width and feet in height, designed to correspond with the roadguard barrier. Directly beneath the filling hole of the roadguard corner connector barrier is a pin extending upward internally from the bottom of the barrier to secure firmly a pole or pipe that can be inserted downward through the filling hole. Said pole or pipe can be used to attach signage, privacy screens or security panels that extend above the barrier line height. The roadguard highway assembly is a reinforcement system for highway barriers that distribute and transfer forces that may occur upon impact of a vehicle so that the overall highway barrier system will have greater strength and integrity. The roadguard highway assembly system meets all NCHRP 350, Test Level 3 Truck and Car Crash Test Specifications, and is approved by the FHWA for use on highway construction projects where the posted vehicle speed in a work zone can be as high as 62mph/100kph. The roadguard highway assembly is a fabricated steel assembly designed to easily mount to the roadguard barriers. This ASSEMBLY provides two distinct functions: Providing a strong and resilient outer surface to resist the wheel and bumper of a striking vehicle, and to link the barriers more securely to each other and create a very robust linear system such that the force of a striking vehicle will be distributed over many barriers, minimizing the lateral movement at the point of impact. The roadguard security panel is used for perimeter security, safety, crowd control and general site protection. These 6’ x 4’ chain link fence panel units install firmly on a roadguard barrier to give a stable 8 foot high continuous, unbroken protective fence for all security and safety needs. Optional solid material, screen, or interwoven