The Lasting Legacy of the 1913 Bion Arnold Report By Jeremy Menzies Looking back at San Francisco’s transportation history, one study from 1913 has impacted the city’s transit system for over 100 years. Commissioned by city officials, the “ Report on the Improvement and Development of the Transportation Facilities of San Francisco ” by engineer Bion J. Arnold , is a comprehensive study of transit in the city. The 450-page report covers everything from rush hour congestion to plans for a Market Street subway. This document is essential to understanding our city’s transportation history and some of its recommendations are still in use today. This 1910 view of Market and Sutter streets shows just some of the complex issues that the Arnold report addressed. Building Muni One section of the report is entirely dedicated to specifications for building and improving the city’s cable and street cars. Muni’s very first streetcars, frequently called “Arnold” cars, were specified based o
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