Could sand be the next great paving material? Thomas Kosbau and Andrew Wetzler recently won a design competition in Korea with their idea to combine sand with a bacteria that turns sand to stone.
Kosbau and Wetzler proposal suggests that road-building trucks "would carry hoppers of sand along with tanks of common Bacillus Pasteurii bacteria in solution. Sprayed on the road, the bacteria go to work chemically on the sand and turn it into a hard, tough cement." The idea would have a significant effect on the environment, because millions of gallons of crude oil go into asphalt road production each year.
Unfortunately, a U.C. Davis engineer asked to investigate the proposal said the material would likely not stand up to heavily-trafficked roads and would only be viable on low-volume roads.
Read the full story: Will Roads of the Future Be Paved With Sandstone?
Analysis: What does America want from surface transportation reauthorization?
Over 13,000 comments were submitted in the federal Request for Information on surface transportation reauthorization. We analyzed all of them.
Follow Planetizen’s analysis of surface transportation reauthorization
Follow along as we explore the upcoming surface transportation reauthorization bill and its potential impacts on US transportation infrastructure in the coming years.
Five reasons infrastructure costs are spiking
State DOTs face a $86 billion shortfall over the next 10 years.
Planetizen Federal Action Tracker
A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.
Amtrak, CN end decades-long dispute with eight-year agreement
The new operating agreement establishes an updated framework for the companies to work together, including processes to resolve disputes.
Judges permit Denver to divert 77,000 acre feet from the Colorado River for reservoir expansion
Overuse and climate change have caused the Colorado River’s water levels to plummet.
Boston has spent millions making the Green Line more accessible — and there’s no end in sight
While the city has invested millions into expanding and adding platforms to the Green Line to make it more accessible, new train cars set to arrive next year will be too tall for disabled passengers to board without raising the current platforms.
Idaho may see an 18% drop in federal surface transit funding — the largest estimated cut in the US
Transit systems in rural communities are much more reliant on federal funding to provide their services.
How ‘post-disaster gentrification’ alters neighborhoods after natural calamities
After hurricanes, fires or other calamities, the original residents of a community are often replaced by younger, wealthier residents.
FREE Course: Walkable City 1: Why Walkability?
After describing his path towards focusing on walkability as the essence of good planning, Jeff Speck marches through his five principal reasons for making more walkable places.
Reinventing Malls: Planning Alchemy—Turning Gray Fields Into Gold
The course focuses on the opportunities and imperatives that shape reinvention of mall sites.
Harvard University Graduate School of Design
KFH Group Inc.
Greater Baltimore Committee
The Architects Foundation
University of Cincinnati Online
The Pocatello Development Authority
The Urban Renewal Agency of the City of Pocatello