The reasons for this containment of gated communities and private streets are not to be sought in morphology (suburban residential developments with lollipops and dead ends are common in France), but rather in local practices by residents.
2010, Renaud Le Goix, Delphine Callen, “Production and Social Sustainability of Private Enclaves in Suburban Landscapes”, in Samer Bagaeen, Ola Uduku, editors, Gated Communities: Social Sustainability in Contemporary and Historical Gated Developments, Earthscan, page 107