The roof of the base is formed into a series of fenced activity platforms and connected with the ground activity space through a green ramp way at its southeast.

The temperature and stress field of wagon wheel under the condition of long ramp way cycle braking in Daqin line have been simulated by using FEM and axial symmetry model.

Instead of stopping, Diane drove the wrong way down an exit ramp, continued along the highway and hit the SUV.