01473836

Component

Modern roundabouts have continued to proliferate in the United States since the first were constructed in the 1990s. Roundabouts offer well-documented safety, capacity, and environmental benefits as compared with most other intersection types. Yet most U.S. roundabouts are built at either isolated locations or in short corridors. The Complete Streets movement has made great inroads in getting engineers to consider the needs of all users when designing a roadway. Yet jurisdictions which have adopted Complete Streets have largely confined themselves to cross sections; the actual layout of the street network is relatively unchanged. New Urbanism has encouraged planners and developers to rethink the layout and spatial arrangement of local streets, but these concepts have typically not made it to the adjacent arterial network. This paper proposes a roundabout-based network of through streets which integrates Complete Streets and Access Management concepts with provision for mass transit and non-motorized transport. A variety of intersection and corridor treatments are explored for interfaces between the roundabout network, local streets, limited access facilities, and existing arterial grids. The roundabout network is intended as a drop-in replacement for the major thoroughfare plans common to most fast-growing cities.

This paper was sponsored by TRB committee ANB75 Roundabouts.

01470560

13-1042
13-1042

English

16p

2013

Transportation Research Board 92nd Annual Meeting

Digital/other

Figures; Photos; References; Tables

Complete streets; Intersections; Network analysis (Planning); Roundabouts; U turns

Road networks

Design; Highways; I20: Design and Planning of Transport Infrastructure

Transportation Research Board Annual Meeting 2013 Paper #13-1042

TRIS, TRB, ATRI

Feb 5 2013 12:18PM