I would guess it's a 'street' whose only outlet is halfway point, while both ends are cul-de-sacs (more or less the shape of a letter T, with the ends of the to

I would guess it's a 'street' whose only outlet is halfway point, while both ends are cul-de-sacs (more or less the shape of a letter T, with the ends of the top part being the cul-de-sacs and the lower part giving access to other streets, etc).