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HYPERLINK "http://findarticles.com/" Isod ceir disgrifiad o'r ffordd y mae ystyr yr ymadrodd wedi datblygu: "'Community severance' as an 'environmental' factor of transport is a concept which has changed in meaning and definition over time. Initially, severance was applied to the increasing separation of homes and workplaces and the adverse effects of the development of the dormitory suburb and the journey to work. These matters were raised in the early studies of town planning and urban development by Pigou and articulated convincingly by Liepmann as given in Table 1. With urban expressway construction, the definition shifted to one of severance as a physical barrier to community interaction. Later, the definition broadened so that severance not only involved physical separation, but also included other undesirable impacts such as visual effects of road structures, and pedestrian delay. In more recent studies, community severance was applied to physical separation, and incorporated psychological and cultural impacts. The meaning of severance has now extended into social impact and human perception. Thus, the conceptualisation of the severance problem in current terminology has two components: static severance (SS) of the road infrastructure as a barrier to the community, and dynamic severance (DS) caused by the flow of vehicles along the road to those pedestrians crossing that road." A fyddai 'gwahanu cymunedau' yn gwneud y tro? Claire Mae Pennawd Cyf yn gwmni cyfyngedig wedi'i gofrestru yng Nghymru a Lloegr o dan y rhif cofrestru 4276774, a chyfeiriad y swyddfa gofrestredig yw 53 Heol yr Orsaf, Ystum Taf, Caerdydd, CF14 2FB. Pennawd Cyf is a limited company registered in England and Wales under the number 4276774, and the address of the registered office is 53 Station Road, Llandaff North, Cardiff, CF14 2FB. -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.446 / Virus Database: 269.5.1/764 - Release Date: 17/04/2007 04:43