Ten Successes That Shaped The 20th Century American City

Historian Larry Gerckens outlines the ten successes that have shaped the modern American City -- from sewage systems to integrated transportation.

1 minute read

February 9, 2006, 1:00 PM PST

By Chris Steins @planetizen


From Success #9, "Control of Land Subdivision", Gerckens write:

"From William Penn's 1683 plan for Philadelphia to the latest neo-traditional addition, the primary American town building motivation has been land speculation. In the nineteenth century this led to oversubdivision, resulting in vacant lots, undeveloped streets, and large-scale default of property to the public through failure to meet tax payments. Lots were often sold with inaccurate or nonexistent surveys, with no access to public streets, or with areas too small to be built upon. Streets were laid out with either inadequate or overly generous rights-of-way, and often on slopes too steep to be negotiated.

Laurence Gerckens is the national historian for the American Institute of Certified Planners and founder of The Society for American City and Regional Planning History.

Thanks to Wayne Senville

Thursday, February 9, 2006 in Planning Commissioners Journal

portrait of professional woman

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching. Mary G., Urban Planner

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching.

Mary G., Urban Planner

Get top-rated, practical training

Concrete Brutalism building with slanted walls and light visible through an atrium.

What ‘The Brutalist’ Teaches Us About Modern Cities

How architecture and urban landscapes reflect the trauma and dysfunction of the post-war experience.

February 28, 2025 - Justin Hollander

Complete Street

‘Complete Streets’ Webpage Deleted in Federal Purge

Basic resources and information on building bike lanes and sidewalks, formerly housed on the government’s Complete Streets website, are now gone.

February 27, 2025 - Streetsblog USA

Aerial view of single-family homes with swimming pools in San Diego, California.

San Diego to Rescind Multi-Unit ADU Rule

The city wants to close a loophole that allowed developers to build apartment buildings on single-family lots as ADUs.

March 9, 2025 - Axios

Cars driving on the American Legion Bridge in Maryland

U.S. Miles Driven Rose by 1 Percent in 2024

Americans drove a total of 3.279 trillion miles in 2024, but per capita VMT stayed the same.

March 10 - Eno Center for Transportation

An adult man, stopped on a Seattle, Washington street corner, preparing for a rainy morning bike commute.

Seattle Recorded Zero Bike Deaths in 2024, per Early Data

The city halved the number of pedestrian deaths compared to 2021.

March 10 - Seattle Bike Blog

Close-up of green ULEZ sign in London, UK.

Study: London ULEZ Rapidly Cleaning up Air Pollution

Expanding the city’s ultra low-emission zone has resulted in dramatic drops in particle emissions in inner and outer London.

March 10 - Smart Cities World