Does burying the father in a Muslim cemetery instead of next to his father's grave on the family land constitute a violation of the will, especially given concerns that the grandfather's grave might be affected by the expansion of a public road?

If the reason for burying the father in the public cemetery instead of his private land with his father is the presence of graves next to the street and the possibility of their exhumation due to expansion, then this is an acceptable justification for not fulfilling his will. In any case, it is not permissible to exhume a grave and move the deceased after burial in a public Muslim cemetery, even if there is no justification, as this contradicts the respect due to the deceased.