| 摘要 |
A breakaway support post (130) for a highway guardrail system (120) to enhance the safety of a vehicle impacting with either the rail face of the associated guardrail or one end of the guardrail facing oncoming traffic. The breakaway support post (130) may be formed from a steel I-beam with one or more elongated slots formed intermediate the ends of the steel I-beam. The slots are preferably formed in the flanges of the I-beam, which are in turn aligned generally parallel with the associated guardrail. Alternatively, a breakaway support post may have an upper (142) and a lower (144) portion with a rotatable coupling (140) assembly disposed there between. A shear pin (156) or other releasing mechanism is provided to maintain the upper and lower portions generally aligned with each other prior to the impact of a vehicle with one end of the associated guardrail. |
