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We need a radius design or wrap around type guardrail.  We are still using the Yuma County design from years ago.  I have requested this project for several years now and I thought that this project was going to be presented to TRB research.  Can you update me on this...Thanks!

You inquired as to whether any other work had been completed on the existing short radius guardrail systems. You are correct that TTI did publish a TRB paper on the  Yuma County system, which was also presented at TRB and published in TRR 2262 (January 2011). For this effort, TTI slightly modified the design and demonstrated that it would meet NCHRP Test Level 2.

On a side note, NDOR has funded a new concept development effort to rethink alternative solutions for treating hazards near intersecting roadways. The Phase I concept development study began in July and lasts 18 months.