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Here’s why there are mysterious giant arrows across the US
In the 1920s, the US government started delivering mail by plane. But planes could only travel during the day. Delivering a letter from coast to coast required a plane and then a train that would travel at night. So the government created the highway of lights, a system of light beacons and large arrows that guided pilots.
1,550 beacons stretched across 18,000 miles. Maintaining this system of giant concrete arrows cost $28 million a year (adjusted for inflation). Before the highway of light it took 83 hours to get a letter across the US. After the system was put into place it took just 33 hours.
Read more stories on Business Insider, Malaysian edition of the world’s fastest-growing business and technology news website.
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In the 1920s, the US government started delivering mail by plane. But planes could only travel during the day. Delivering a letter from coast to coast required a plane and then a train that would travel at night. So the government created the highway of lights, a system of light beacons and large arrows that guided pilots.
1,550 beacons stretched across 18,000 miles. Maintaining this system of giant concrete arrows cost $28 million a year (adjusted for inflation). Before the highway of light it took 83 hours to get a letter across the US. After the system was put into place it took
Read more stories on Business Insider, Malaysian edition of the world’s fastest-growing business and technology news website.
✍ Sumber Pautan : ☕ Business InsiderBusiness Insider
Kredit kepada pemilik laman asal dan sekira berminat untuk meneruskan bacaan sila klik link atau copy paste ke web server : http://ift.tt/2qwLUMO
(✿◠‿◠)✌ Mukah Pages : Pautan Viral Media Sensasi Tanpa Henti. Memuat-naik beraneka jenis artikel menarik setiap detik tanpa henti dari pelbagai sumber. Selamat membaca dan jangan lupa untuk 👍 Like & 💕 Share di media sosial anda!
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Kini anda membaca artikel Here’s why there are mysterious giant arrows across the US dengan alamat pautan https://timesnewmalaysia.blogspot.com/2017/05/heres-why-there-are-mysterious-giant.html
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