<tt id="6hsgl"><pre id="6hsgl"><pre id="6hsgl"></pre></pre></tt>
          <nav id="6hsgl"><th id="6hsgl"></th></nav>
          国产免费网站看v片元遮挡,一亚洲一区二区中文字幕,波多野结衣一区二区免费视频,天天色综网,久久综合给合久久狠狠狠,男人的天堂av一二三区,午夜福利看片在线观看,亚洲中文字幕在线无码一区二区
             
           
          Keep that traffic rolling
          By Tan Zongyang (China Daily)
          Updated: 2011-04-08

           Keep that traffic rolling

          Li Xu (below), a 22-year-old university student, has designed a clover-leaf-shaped interchange to hopefully solve traffic jams in cities. Provided to China Daily

          Keep that traffic rolling

          Beijing - There are no gridlocked roads in Li Xu's world. Traffic flows smoothly and specially designed intersections keep everyone on the move.

          Such fluidity is all due to the 22-year-old university student's remedy for the road - clover-leaf-shaped interchanges - a proposal which this week set in motion the wheels of debate from drivers, traffic experts and authorities.

          "I know many people laughed at me because they thought the plan was unrealistic," said Li, who studies traffic engineering at Harbin Institute of Technology at Weihai, Shandong province.

          "But I always encourage myself with the story of the Wright brothers, who were laughed at by others before putting the first ever plane into the sky."

          Li's intersection design proposes several swerve lanes, which help cars move ahead or turn in any direction without running into each other.

          It also shortens the distance needed to make a U-turn and the traffic lights usually seen at intersections are removed, saving waiting time.

          "The bridge has just one layer for the overpass and the design is quite handy for drivers to navigate their way," Li said, adding that he had reduced the design size many times to maintain its suitability for smaller junctions yet save construction cost.

          Many online comments have appealed to the government to use the design to help ease severe traffic congestion in cities.

          However, many experts have labeled the design as impractical.

          Xiao Rucheng, professor at Shanghai-based Tongji University, told China Daily the size of the bridge would be much larger than expected if put into construction. If so, it would lose the value of fitting into small junctions.

          In addition, pedestrian and bicycle lanes were absent, which would be another difficulty to design.

          Ma Lin, deputy director of the Urban Transport Center, Ministry of Housing and Urban-Rural Development, said in an early report that Beijing's traffic volume is too huge to adopt the plan, or it could even worsen the situation.

          Li said the idea incubated for two years.

          "My father lost a business opportunity in Beijing after he was caught in traffic in 2007," he said. "It pushed me to think of how to apply my skills to solve real traffic problems rather than get high scores in school exams."

          Li started to study intersection design and collected pictures of many overhead bridges, examining their shapes and designs.

          He also measured the slope of overpasses in Weihai, observing how they affect the speed of cars - practical information he could apply to Beijing, which he feels is the most suitable place to practice his design as its roads are laid out in a grid.

          Li's ambitious project also inspired his father, a retired civil servant in his hometown in Henan province.

          His father started to read books on traffic engineering and learned how to use computer-aided design software by following online video instructions, and offered his son assistance as well as tons of encouraging words.

          Last October, Li decided to apply for a patent from the State Intellectual Property Office, and his application passed the preliminary examination and is now waiting to be ratified by the patent authority.

          Taking the advice of critics, Li is now busy revising his original work as well as verifying its feasibility.

          He has even decided to incorporate the design into his graduation thesis, which aims to use simulation software to test how the bridge performs in virtual reality.

          "I hope the result will prove that the design is reliable and could benefit more people," he said.

          China Daily

          (China Daily 04/08/2011 page2)


          主站蜘蛛池模板: 毛片网站在线观看| 偷拍精品一区二区三区| 久久久久久综合网天天| 国产偷窥厕所一区二区| 国产精品白浆免费视频| 性视频一区| 色五月丁香六月欧美综合| 51妺嘿嘿午夜福利| 午夜福利国产一区二区三区| 亚洲av免费成人精品区| 国产网友愉拍精品视频| 久久精品免费无码区| 日本中文字幕乱码免费| 久久精品国产热久久精品国产亚洲| 国产精品一区二区三区黄色| 色爱综合另类图片av| 国产精品亚洲一区二区三区喷水| 又爽又黄又无遮挡的激情视频| 亚洲成av人的天堂在线观看| 99福利一区二区视频| 欧洲免费一区二区三区视频| 亚洲一区二区三级av| 国产免费无遮挡吸奶头视频| 成本人片无码中文字幕免费 | 亚洲精品精华液| 日韩精品中文女同在线播放| 亚洲鸥美日韩精品久久| 国产精品会所一区二区三区| 精品一区二区三区在线播放视频| 亚洲变态另类天堂AV手机版| 91网址在线播放| 国产一区二区不卡在线| 亚洲区一区二区三区视频| 欧洲极品少妇| 国产乱人伦AV在线A| 极品美女销魂一区二区三| 东京热无码国产精品| 欧美人与动牲交精品| 少妇高潮水多太爽了动态图| 亚洲一区二区三区久久蜜桃| 狠狠色丁香婷婷综合尤物|