White Roads to Keep EDSA & C-5 Cool

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Our country, the Philippines, is highly susceptible to the impacts of climate change especially to the rising of temperatures. For the past 50 years, climate data shows that the temperatures rise by about 0.011°C annually. By 2020, a country's mean annual temperature is expected to increase by about 0.9°C to 1.4°C, and 1.7°C to 2.4°C by 2050.

 
The roads we have - which are mostly made of black asphalt - absorbs too much heat during daytime and slowly releases them overnight which keeps the temperature artificially high. Although asphalt can take very high temperatures, it reduces its durability when combined with dynamic loads, high temperatures and the constant contact with the atmosphere's oxygen. With the excessive heat, tires can become hot beyond their design ratings. The failure and blowout of tires may be caused by the increased friction, high-speed driving, excessive cornering and frequent braking during periods of very high temperatures. 

 
White roads could drop temperatures in packed urban areas by 7°C, or about 44°F. It could keep the area up to 5.55°C cooler which is a significant difference since global temperatures still continue to increase. The pale complexion of "cool roads" wouldn't absorb nearly as much amount of sunlight. Instead, it would reflect much of the sun's rays right back into space. If used widely, it could possibly prevent air pollution and also avoid heat strokes.



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