Nacto Urban Street Design Guide

Nacto Urban Street Design Guide
Title	NACTO Urban Street Design Guide
Publisher	National Association of City Transportation Officials
Pub date	2013
Pages	224
Language	English

Nacto Urban Street Design Guide is a design manual produced by the National Association of City Transportation Officials intended to provide urban street design recommendations for cities seeking to enhance multimodal mobility. The guide synthesizes practice-based recommendations influenced by projects in cities such as New York City, San Francisco, Portland, Oregon, Boston, and Chicago, and aligns with global precedents like Copenhagen, Amsterdam, Bogotá, Paris, and Barcelona.

Introduction

The guide offers context-sensitive design treatments addressing pedestrians, cyclists, transit, and motor vehicles, drawing on municipal policies from New York City Department of Transportation, San Francisco Municipal Transportation Agency, Los Angeles Department of Transportation, Seattle Department of Transportation, and Washington, D.C. Department of Transportation. It compiles geometric standards, curb treatments, signal timing strategies, and lane configurations used in high-profile projects including Times Square (New York City), Market Street (San Francisco), Broadway (Portland, Oregon), La Rambla, and Gran Vía, Madrid. The publication positions itself alongside international guidance like the Manual on Uniform Traffic Control Devices and national policy instruments such as the Fixing America's Surface Transportation Act.

History and Development

The guide emerged from collaborative initiatives within the National Association of City Transportation Officials, which grew from municipal networks involving New York City, San Francisco, Chicago, Boston, and Philadelphia. Early development incorporated pilot projects led by agencies including the New York City Department of Transportation and advocacy from organizations such as the Institute of Transportation Engineers, the American Planning Association, Transportation for America, and Urban Land Institute. Key influences included the street redesigns of Times Square (New York City), the bus rapid transit programs of TransMilenio, and the protected bike lane programs in Copenhagen, while peer review drew on research from institutions like MIT, University of California, Berkeley, Harvard University Graduate School of Design, and University College London.

Design Principles and Guidance

The guide emphasizes principles of safety, equity, sustainability, and placemaking, citing case studies from New York City, Bogotá, Copenhagen, Amsterdam, and Seville. Technical chapters cover lane widths, curb radii, crosswalks, bike lanes, and signal phasing with examples from Broadway (New York City), Second Avenue Subway, Market Street (San Francisco), Nicollet Mall, and El Paseo de la Reforma. It presents design solutions including protected bike lanes used in Copenhagen, sidewalk expansion strategies applied in Barcelona, transit priority measures like those in Bogotá’s TransMilenio, and pedestrian plazas modeled on Times Square (New York City). The guidance references regulatory frameworks and standards such as the Manual on Uniform Traffic Control Devices, national roadway classification systems in the United States, and urban design precedents from Haussmann's renovation of Paris.

Applications and Implementation

Cities have applied the guide to street redesigns, pilot projects, and capital programs in municipalities including New York City, San Francisco, Seattle, Portland, Oregon, Philadelphia, Chicago, and Los Angeles. Implementation examples include protected bike lane networks modeled after Copenhagen, bus lanes inspired by TransMilenio, curb management strategies like those on Market Street (San Francisco), and plaza conversions akin to Times Square (New York City). Funding and delivery have involved federal programs such as the Moving Ahead for Progress in the 21st Century Act and partnerships with local agencies including Metropolitan Transportation Authority (New York), Bay Area Rapid Transit, King County Metro, and regional planning bodies like Metropolitan Transportation Commission (San Francisco Bay Area). The guide has been used in permitting and design review processes with input from professional bodies including the Institute of Transportation Engineers, the American Society of Civil Engineers, and the American Planning Association.

Reception and Impact

The guide has been praised by urbanists, planners, and transportation agencies including American Planning Association, Transportation Research Board, Institute of Transportation Engineers, and advocacy groups such as Transportation for America and PeopleForBikes. Its methodologies influenced major projects in New York City, San Francisco, Portland, Oregon, Seattle, and international cities like Bogotá and Copenhagen. Academic commentary from MIT, Harvard Graduate School of Design, UC Berkeley, and University College London has examined its evidence base, while professional recognition has come from organizations including the Urban Land Institute and design awards presented by American Institute of Architects chapters. The guide contributed to shifts in street design practice alongside movements such as tactical urbanism promoted by Project for Public Spaces and Open Streets initiatives like Ciclovía.

Criticisms and Limitations

Critics have argued that the guide may prioritize city-scale interventions favored by large municipalities such as New York City and San Francisco over rural or small-city contexts like Des Moines, Iowa or Bozeman, Montana, and that application can be constrained by legal frameworks like the Manual on Uniform Traffic Control Devices and federal funding rules under statutes such as the Fixing America's Surface Transportation Act. Scholars from University of California, Berkeley, MIT, and Princeton University have questioned the transferability of case studies from elite cities to diverse contexts, while organizations including the American Trucking Associations and some local business groups have raised operational concerns in freight movement corridors like Port of Los Angeles. Other critiques center on equity implications discussed by institutions such as Brookings Institution and Urban Institute and calls for more rigorous long-term evaluation from research entities like the Transportation Research Board and National Academies of Sciences, Engineering, and Medicine.

Category:Urban planning