ideas for cities

This Big City on tumblr is your source for ideas that can make cities better. It is curated by Joe Peach and Lucas Lindsey.

Joe founded This Big City in 2009. He is a Marketing professional and works in one of London's most sustainable buildings.

Lucas is an urbanist, futurist, and blogger. He's the child of a suburban nation, but born again believer in an urban future. He lives in Tallahassee, USA.

If you have an idea you'd like to share, click the submit button!

sprawlnation:

No, Bike Lanes Don’t Cause Crazy Congestion
While they do increase congestion, the effect is minimal. The Fast Company article does stress that roads should be selected based on their existing design in order to deal with the realities of car reliant cities. Pushing to hard to make bike lanes work in less pedestrian freindly areas could have detreminal effects. Congestion that slows emergency responsiveness is an example.
While the article is light on content, the headline alone is enough of an eye-grabber to start a conversation about when, where and how fast, bike lanes appear on our roadways.
  High-res

sprawlnation:

No, Bike Lanes Don’t Cause Crazy Congestion

While they do increase congestion, the effect is minimal. The Fast Company article does stress that roads should be selected based on their existing design in order to deal with the realities of car reliant cities. Pushing to hard to make bike lanes work in less pedestrian freindly areas could have detreminal effects. Congestion that slows emergency responsiveness is an example.

While the article is light on content, the headline alone is enough of an eye-grabber to start a conversation about when, where and how fast, bike lanes appear on our roadways.

"Across the globe every single day, individuals and communities are making their cities better places through smaller scale projects, improving the lives of urban citizens in the process.”
We want to share those stories of local community development intervention from around the world. Help us do it by providing feedback on our Knight News Challenge submission! Here’s a link, tumblr friends!   High-res

"Across the globe every single day, individuals and communities are making their cities better places through smaller scale projects, improving the lives of urban citizens in the process.”

We want to share those stories of local community development intervention from around the world. Help us do it by providing feedback on our Knight News Challenge submission! Here’s a link, tumblr friends!

kenyatta:

Urban heat island - Wikipedia, the free encyclopedia

An urban heat island (UHI) is a metropolitan area that is significantly warmer than its surrounding rural areas due to human activities. The phenomenon was first investigated and described by Luke Howard in the 1810s, although he was not the one to name the phenomenon. The temperature difference usually is larger at night than during the day, and is most apparent when winds are weak. UHI is most noticeable during the summer and winter. The main cause of the urban heat island effect is from the modification of land surfaces, which use materials that effectively store short-wave radiation. Waste heat generated by energy usage is a secondary contributor. As a population center grows, it tends to expand its area and increase its average temperature. The less-used term heat island refers to any area, populated or not, which is consistently hotter than the surrounding area.
Monthly rainfall is greater downwind of cities, partially due to the UHI. Increases in heat within urban centers increases the length of growing seasons, and decreases the occurrence of weak tornadoes. The UHI decreases air quality by increasing the production of pollutants such as ozone, and decreases water quality as warmer waters flow into area streams and put stress on their ecosystems.
Not all cities have a distinct urban heat island. Mitigation of the urban heat island effect can be accomplished through the use of green roofs and the use of lighter-colored surfaces in urban areas, which reflect more sunlight and absorb less heat.
Despite concerns raised about its possible contribution to global warming, comparisons between urban and rural areas show that the urban heat island effects have little influence on global mean temperature trends.


File this one under: Things You Should Know About Cities.   High-res

kenyatta:

Urban heat island - Wikipedia, the free encyclopedia

An urban heat island (UHI) is a metropolitan area that is significantly warmer than its surrounding rural areas due to human activities. The phenomenon was first investigated and described by Luke Howard in the 1810s, although he was not the one to name the phenomenon. The temperature difference usually is larger at night than during the day, and is most apparent when winds are weak. UHI is most noticeable during the summer and winter. The main cause of the urban heat island effect is from the modification of land surfaces, which use materials that effectively store short-wave radiation. Waste heat generated by energy usage is a secondary contributor. As a population center grows, it tends to expand its area and increase its average temperature. The less-used term heat island refers to any area, populated or not, which is consistently hotter than the surrounding area.

Monthly rainfall is greater downwind of cities, partially due to the UHI. Increases in heat within urban centers increases the length of growing seasons, and decreases the occurrence of weak tornadoes. The UHI decreases air quality by increasing the production of pollutants such as ozone, and decreases water quality as warmer waters flow into area streams and put stress on their ecosystems.

Not all cities have a distinct urban heat island. Mitigation of the urban heat island effect can be accomplished through the use of green roofs and the use of lighter-colored surfaces in urban areas, which reflect more sunlight and absorb less heat.

Despite concerns raised about its possible contribution to global warming, comparisons between urban and rural areas show that the urban heat island effects have little influence on global mean temperature trends.

File this one under: Things You Should Know About Cities.