Olá, Thundercel!

Há alguma recomendação nova para incluir restrições de retorno de uma via para ela mesma?

A documentação da wiki ainda é no sentido de não se mapear esse tipo de restrição, conforme https://wiki.openstreetmap.org/wiki/Relation:restriction, em especial: "Don't map turn restrictions that are the default for a given jurisdiction and are not signed. It is much better to ensure that routing engines embody the regional rule rather than mapping every occurrence as a turn restriction. This applies particularly to unsigned U-turns in Brazil, where using turn restrictions will require hundreds or thousands of restrictions and micro-segmentation of all roads which in turn make editing data hard."

Abraço!