“The Federal Highway Act of 1944 stipulated that highways should be built primarily to serve the national defense – so, suburbanization was essentially an unintended consequence,” Baum-Snow said. “Without the more than 40 thousand miles of interstate roads built by 1990, urban decentralization would have probably still taken place, but the population shift would not have been nearly as sizable.”
To compare rates of suburbanization in metropolitan areas that received many new highways between 1950 and 1990 to those receiving fewer during the same period, Baum-Snow created a unique data set. Using data on 139 large metropolitan areas and information from a 1947 plan of the highway system, he measured the highways as “rays” emanating from central cities – a “ray” is defined as a segment of road that connects the central business district of the central city with the region outside the central city.
“The estimates put forth in this paper are certainly relevant and applicable to current transportation infrastructure planning in urban areas in developing countries including China and India,” said Baum-Snow. “Urban transportation planners should consider that building a highway system through urban areas has the potential to dramatically change where people choose to live and how much land is developed.”
Baum-Snow is an assistant professor of economics and is affiliated with both the Population Studies and Training Center at Brown University and Spatial Structures in the Social Sciences (S4). He received his Ph.D. in economics from the University of Chicago in 2005.
Editors: Brown University has a fiber link television studio available for domestic and international live and taped interviews, and maintains an ISDN line for radio interviews. For more information, call (401) 863-2476.
Deborah Baum | EurekAlert!
Microtechnology industry is hiring – positive developments of past years continue
09.04.2018 | IVAM Fachverband für Mikrotechnik
RWI/ISL-Container Throughput Index with minor decline on a high overall level
20.03.2018 | RWI – Leibniz-Institut für Wirtschaftsforschung
The more electronics steer, accelerate and brake cars, the more important it is to protect them against cyber-attacks. That is why 15 partners from industry and academia will work together over the next three years on new approaches to IT security in self-driving cars. The joint project goes by the name Security For Connected, Autonomous Cars (SecForCARs) and has funding of €7.2 million from the German Federal Ministry of Education and Research. Infineon is leading the project.
Vehicles already offer diverse communication interfaces and more and more automated functions, such as distance and lane-keeping assist systems. At the same...
A research team led by physicists at the Technical University of Munich (TUM) has developed molecular nanoswitches that can be toggled between two structurally different states using an applied voltage. They can serve as the basis for a pioneering class of devices that could replace silicon-based components with organic molecules.
The development of new electronic technologies drives the incessant reduction of functional component sizes. In the context of an international collaborative...
At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.
At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...
There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?
At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...
So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics
Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...
25.05.2018 | Event News
02.05.2018 | Event News
13.04.2018 | Event News
25.05.2018 | Event News
25.05.2018 | Machine Engineering
25.05.2018 | Life Sciences