A bridge displacement calculating apparatus comprises a DC component removing part, a high-pass filter part, a first integration part, and a second integration part. The DC component removing part outputs DC-removed acceleration data. The high-pass filter part uses, as a cutoff frequency, the reciprocal of a time in which a vehicle has passed between the frame bodies of the bridge. The first integration part integrates input data thereto. The second integration part integrates input data thereto and outputs displacement data. The high-pass filter part receives DC-removed acceleration data, the first integration part receives the output of the high-pass filter part, the second integration part receives the output of the first integration part, or the first integration part receives the DC-removed acceleration data, the high-pass filter part receives the output of the first integration part, and the second integration part receives the output of the high-pass filter part.

A curb ramp that is designed to be mounted on an e-track for storage. The curb ramp has mounting hardware that is attached to the sides of the ramp and includes a pair of straps with e-track clips. The e-track clips are removably fastened in grooves of the e-track for hanging the curb ramp. The straps are fastened to the side edges of the ramp using fasteners means including a hex bolt, a plurality of flat washers, and a hex nut such that the strap is securely fastened to the ramp. In use, the e-track clips being engaged to the e-track allows the curb ramp to hang therefrom.

A curb ramp that is designed to be mounted on an e-track for storage. The curb ramp has mounting hardware that is attached to the sides of the ramp and includes a pair of straps with e-track clips. The e-track clips are removably fastened in grooves of the e-track for hanging the curb ramp. The straps are fastened to the side edges of the ramp using fasteners means including a hex bolt, a plurality of flat washers, and a hex nut such that the strap is securely fastened to the ramp. In use, the e-track clips being engaged to the e-track allows the curb ramp to hang therefrom.