I just found this pdf from the expert from the European Commission. . . a draft amendment to update the Frontal Underrun Protection regulation. “The amendment is proposed in particular to allow more rounded shape of the cab in light of better aerodynamic performance.”   https://www.unece.org/fileadmin/DAM/trans/doc/2018/wp29grsg/GRSG-115-25e.pdf

Good job! Join my Underride Hero Hall of Fame. Certainly ongoing traffic safety research & development is appropriate if the pursuit of the best possible protection for road users is our goal.

Well, then. . . let’s get on with it, shall we?