| 摘要 |
A triangular retractable safety marker provides motorists and motorcyclists with advance warning of disabled vehicles and/or work zone areas. The device has been designed to withstand reasonable winds through the use of two base supports, a lower portion and two sets of lower, middle and upper risers. The risers allow for the device to easily expand to height consistent with traffic engineering design standards for triangles when in operation and then compact when it is in storage. The two base supports in are designed not only to provide the necessary structural stability but to also open and close about the retractable risers thus providing for additional compactness. The upper part of the lower portion along with the two sets of lower, middle and upper risers have reflective decals affixed to them to correspond with standard triangle design.
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