Since the publication of NCHRP Synthesis 299 in 2001, a considerable amount of research related to operational and safety effects of highway and street geometrics has been completed. Application of this knowledge is sometimes limited because of the sheer volume of information that exists and the rapid pace in which it is produced and published. Geometric design research results are scattered across a variety of different tools and publications that are not easily accessible to highway and street geometric designers and geometric design policy makers. This synthesis identifies and summarizes roadway geometric design literature completed and published from 2000 through early 2011, particularly research that identified impacts on safety and operations. Findings within the synthesis are presented in groups similar to key chapters and sections within AASHTO’s A Policy on Geometric Design of Highways and Streets (commonly referred to as the Green Book). Some key findings are provided here. (Author/publisher) This report is available online at http://onlinepubs.trb.org/onlinepubs/nchrp/nchrp_syn_432.pdf
Samenvatting