"TRB's Transit Cooperative Research Program (TCRP) Synthesis 64: Bus Use of Shoulders explores transit agencies' experiences with policies and regulations that permit buses to use shoulders on arterial roads or freeways to bypass congestion either as interim or long-term treatments. The report examines the issue from the transit and highway perspectives"--Publisher's description.

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.

"Provides guidelines for the planning, design, and implementation of BOS operations along urban freeways and major arterials ... The report should be useful as a decision-making guide to assist transit operators, state DOTs, MPOs, and other stakeholders in assessing the feasibility of the BOS concept, developing safe and effective BOS plans, implementing initial BOS operations, and maintaining or expanding ongoing BOS operations."--Foreword.

Narrower lanes and use of shoulders tested on sections of the Southwest Freeway, Houston.