Song Youzhou, designer of the tall, lane-straddling bus known as batie, which allows cars to pass beneath, said the bus can run smoothly despite doubts people have raised, paper.cn reported on Monday.

The feasibility of the so-called Transit Elevated Bus was questioned after a test run earlier this month in Qinhuangdao, Hebei province.

The bus, 4.8 meters high, 7.8 meters wide and 22 meters long, is designed with a passenger area, with a capacity of 300, high above the road, according to its maker, TEB Technology Development Co.