Getting caught in a traffic jam can be one of the most depressing things about traveling around a busy city. Now engineers in China have come up with a solution that could reduce traffic.

“Batie”, an elevated bus that is 4.8 meters high and 7.8 meters wide, allowing it to travel over vehicles (such as cars, buses, or trucks) with a height of less than 2 meters. holds passengers on its upper level and lets traffic pass under it, made its first test run on Aug 2 in Qinhuangdao, Hebei province.

 It can cut down on traffic greatly and therefore reduce the country’s increasingly worrying air pollution, the developers of the TEB told The Week.

 It is also expected to save costs compared with other public transportation (交通运输) like the subway. “Able to carry 1,200 people at a time, the TEB has the same functions as the subway while its cost of construction is less than one fifth that of a subway” Bai Zhiming, the engineer in charge of the TEB project, said in a video interview with CCTV News.

 While it has been said that the bus could be a solution to world’s traffic problems, it has also caused criticism (批评) and doubt.

Yao Tao, head of the Nanjing Institute of City and Transport Planning, listed some other possible problems, including the fact that present traffic facilities (设施) and rules would have to be changed.

“Safety is the most important thing,” Liu Daizong, China transport program director at the World Resources Institute, told CNN. “How would cars drive and turn under the bus? If there were an accident, how would you move passengers and vehicles out from underneath?”