BW 154 AP Form follows function and makes an impact - nowhere else does design meet function more consistently than with tandem rollers. This results in the practical styling of the BW 154 BP. Take the redesigned operatorŽs cab, for example: It demonstrates the interplay between function and style, which is expressed even more by the context of the front and rear structures of the machine. The result is a design that looks good and works well too!