You can find useful info on this topic in the following research paper:

Magdy Samaan, Khaled Sennah, and John B. Kennedy, "Positioning of bearings for curved continuous spread-box girder bridges", Can. J. Civ. Eng. 29: 641–652 (2002)

Thanks about your guidance Michele Granata.

thanks indeed Aria Tsam. In some of the FHWA Design examples, the orientation of bearings is selected such that their axis intersect the basic bearing.

Good question.. Please share me the best answer might you trust...

Regards…