Samenvatting
The AASHTO Roadside Design Guide (RDG) 4th edition was published in October 2011. The purpose of this memo is three-fold: 1) Reiterate the status of the RDG for FHWA, 2) Summarize significant changes in the RDG 4th edition, and 3) Add Frequently Asked Questions to the FHWA website. (Author/publisher)