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Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete.
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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Application of Concrete in the Abolishment of Grade Crossings in the City of Philadelphia
Author(s): James W. Phillips
Publication: Journal Proceedings
Appears on pages(s): 285-292
Abstract:A brief review of the history of the abolishment of grade crossing in the City of Philadelphia may be of interest. Prior to the consolidation in 1854 the area of the city was 2.75 sq. miles; it now has an area of 129.5 sq. miles, which includes what was formerly the Country of Philadelphia, embracing twenty-seven outlying districts; each of these districts had much unoccupied territory and was governed by its own local authorities.
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