From: Aerodynamic loads and bridge responses under train passage: case study of an overpass steel box-girder cable-stayed bridge
Comfort class
Degree of comfort
Vertical acceleration (m/s2)
Lateral acceleration (m/s2)
CL1
Maximum
< 0.50
< 0.10
CL2
Medium
0.50 ~ 1.00
0.10 ~ 0.30
CL3
Minimum
1.00 ~ 2.50
0.30 ~ 0.80
CL4
Unacceptable discomfort
> 2.50
> 0.80