Appendixes to NCHRP Report 572: Roundabouts in the United States

Based on a comprehensive evaluation of roundabouts in the United States, NCHRP Report 572 presents methods of estimating the safety and operational impacts of roundabouts and updates design criteria for them. This web document contains the appendices to NCHRP Report 572, as follows: (A) Literature Review on Safety Performance; (B) Literature Review of Operational Models; (C) Site Inventory; (D) Pedestrian and bicycle Analysis Details; (E) Summary of Goodness-of-Fit Measures and Statistical Terms; (F) Statistical Testing of Intersection-Level Safety Models; (G) Definitions for Estimating Fastest Vehicle Paths; (H) Statistical Testing of Approach-Level Safety Models; (I) Statistical Testing of Speed-Based Safety Models; (J) Operations Appendix; (K) Pedestrian Analysis Tables; (L) Pedestrian and Bicycle Images; (M) Draft Highway Capacity Manual Chapter 17; and (N) Research Problem Statement.