Case Study 4 Dorset County Council 'Highway Guidance for Estate Roads' Carrying innovative policy through to implementation The Dorset County Council Highway Guidance for Estate Roads was published in 2002. It arose from concern that new residential areas were frequently places which were indistinguishable from each other and often related badly to their locale. In other words, 'anywhere development'. Dorset County Council has recognised that in order to create new residential areas which reflect their context and which have a high quality of urban design: "..well designed housing layout requires that all aspects of the design be considered at the same time. In this respect the highway layout should not be considered in isolation since it is an integral part of the residential environment." One of the characteristics that marks this document out from design guidance issued elsewhere, is the support for speed restraint that is designed into the development from the beginning and not 'bolted-on' as an afterthought. The guidance is categorical that speed humps or chicanes will not be acceptable but that traffic speed will be kept low through the positioning of key buildings and spaces, and by reducing the effective length of road sections to 60m. Accordingly, speeds can be kept below 20mph. This is further encouraged by other measures. These include the promotion of junctions with reduced radii (which encourages drivers to slow down), the provision of speed restraining bends (which reduce forward visibility), and by varying the width of the horizontal alignment. On-street parking is also allowed. Many of these design features are aimed at driver perception. The driver feels less confident when travelling through the streets and drops his or her speed accordingly. Whilst the guidelines are applied to any new residential development throughout Dorset, they are most famously embodied within the urban landscape of Poundbury, an extension to the County town of Dorchester. Phase 1 of the 25 year programme is complete and has an urban form specifically designed to limit the speed and visual effect of vehicles. Pedestrians take priority over vehicles with parking and servicing facilities being located on streets and within rear courtyards where possible. Sightlines are limited at junctions and there are no clear priorities. Only a single street sign exists within the development area, yet records for the past three years show that there have been no accidents. |