ROADSIDE MEMORIALS ON THE AMERICAN HIGHWAY
Folklorist Wade Patterson suggests resources below in New Mexico where these roadside shrines are typically called descansos.
An interesting research project on descansos in the American southwest called DESCANSOS : ROADSIDE MEMORIALS ON THE AMERICAN HIGHWAY:
Traditionally Descansos (Spanish for 'place of rest') marked
the place of loss. My mission is to have the loss never forgotten; to
reduce human suffering; & to assist the healing of loved ones left behind. A great site about funeral practices in general with a wonderful section on roadside markers.
An interesting site by a 13 year old young lady living in the Penasco valley in northern New Mexico who has documented some sites in her area.