This report by the Federal Highway Administration (FHWA) provides information about the funding of Federal-aid highways. The report details the fiscal process of funding the highways from inception in an authorization act to payment from the Highway Trust Fund. In addition, congressional and Federal agency actions that take place throughout this process are discussed. Related items: Federal Highway Administration (FHWA) publications can be found here: https://bookstore.gpo.gov/agency/federal-highway-administration-fhwa Department of Transportation (DOT) publications can be found here: https://bookstore.gpo.gov/agency/department-transportation-dot

TRB's National Cooperative Highway Research Program (NCHRP) Report 672: Roundabouts: An Informational Guide - Second Edition explores the planning, design, construction, maintenance, and operation of roundabouts. The report also addresses issues that may be useful in helping to explain the trade-offs associated with roundabouts. This report updates the U.S. Federal Highway Administration's Roundabouts: An Informational Guide, based on experience gained in the United States since that guide was published in 2000.