STREETSCAPE GUIDANCE

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HOME INTRODUCTION PART A A vision for London’s streets PART B From strategy to delivery PART C New measures for new challenges PART D Balancing priorities PART F Appendix PART E Physical design and materials SECTION 6 Introduction SECTION 7 High quality footways SECTION 8 Carriageways SECTION 9 Crossings SECTION 10 Kerbside activity SECTION 11 Footway amenities SECTION 12 Safety and functionality SECTION 13 Street environment SECTION 14 Transport interchanges Streetscape Guidance [Part E – Physical design and materials] Crossings 130 There are four types of tactile paving used in London: Blister Ladder and tramline Corduroy Lozenge Those involved in the design of tactile paving layouts should familiarise themselves with the design principles outlined in DfT’s Guidance on the use of Tactile Paving Surfaces (1998), acting as the current national guidance. Designers should also acknowledge that ongoing research and experience in delivery has shaped what we consider to be best practice. Common issues in application Along with other local authorities in London, we have become increasingly aware that rigid application of the national guidance can have a detrimental impact on the legibility of tactile provision and negatively impact on the visual quality of the footway. The complexity of London’s street network, with irregular kerb geometries and angles of crossings, creates challenges for designers to comply with national guidance while providing a visually clean layout which is easily understood by people with visual impairments. Common issues with layouts have emerged since the national guidance was produced and Streetscape Guidance recommends a number of departures from national guidance to overcome these challenges. Ongoing research We are undertaking ongoing research to conclude best practice designs for tactile paving to ensure the materials are effective. Streetscape Guidance will be reviewed and updated as research is completed to reflect best practice. Good practice Tactile paving should be carefully detailed to ensure consistency and quality in application so that it does not adversely affect the overall aesthetic of the streetscape. This extends to the workmanship and neatness of finish, with good planning and detailing required for overcoming any potential construction issue. Detailing • Inset covers should always be used where tactile paving meets an inspection cover and the careful design of fold and cut lines should be detailed to ensure the blister texture is consistently aligned across the cut • Borders, such as the use of paint or setts, should not be provided around tactile paving • The gradient of dropped kerbs should be carefully designed so as to maintain a constant gradient across the tactile surface • Quadrant kerbs can be useful to ensure a neat finish at tight corners, ensuring vertical alignments are well integrated to avoid trip hazards • Minimise the amount of tactile surfaces used to provide adequate support for visually impaired people while reducing the discomfort for those with walking difficulties and users of buggies or large bags Materials Concrete and natural stone are the most suitable materials for tactile paving as they are readily available in a range of appropriate colours, can be precast or cut into the required shape and have good slip resistance properties.
HOME INTRODUCTION PART A A vision for London’s streets PART B From strategy to delivery PART C New measures for new challenges PART D Balancing priorities PART F Appendix PART E Physical design and materials SECTION 6 Introduction SECTION 7 High quality footways SECTION 8 Carriageways SECTION 9 Crossings SECTION 10 Kerbside activity SECTION 11 Footway amenities SECTION 12 Safety and functionality SECTION 13 Street environment SECTION 14 Transport interchanges Streetscape Guidance [Part E – Physical design and materials] Crossings 131 Yorkstone and granite may be considered at the request of the borough or where there is an urban design or heritage justification. It is prone to wear and does not generally comply with colour guidance. Use of Yorkstone or granite for tactile paving is subject to SDRG approval. Metal studs are not generally recommended for use on the TLRN but may be considered by the SDRG in exceptional circumstances. Detailed application Blister paving Application: Blister paving is used for two different purposes, functioning as a navigational guide for visually impaired pedestrians to help users locate, operate and cross at: • Controlled crossings • Uncontrolled crossings Red concrete Granite Grey concrete Metal studs Yorkstone The design and layout differs for these two applications, enabling this variation in crossing type to be communicated to users. Layout Blister paving at signal controlled crossings – should be provided at the kerb of the designated crossing point, as well as across the footway itself as a ‘tactile tail’. Figure 128: Blister paving at a signal controlled crossing Layout criteria Dimensions • 400x400mm paving unit with series of regular flat-topped blisters (5mm high, 25mm diameter) regularly spaced at 64-67mm across the unit. Placement • Two rows of 400x400mm tactile, for a total of 800mm wide at the narrowest point across the full width of the flush crossing. Tactile tails will form an ‘L’ shape at the crossing and are to be 800mm wide • Blister paving should be oriented to align with the direction of the crossing • Only full tactile slabs should be installed • The maximum gradient should be of eight per cent (1 in 12) on the direct approach to a crossing and nine per cent (1 in 11) on the flared sides Colour • Red is standard on the TLRN for controlled crossings • Contrasting grey for controlled crossings will be considered in conservation areas, or where red paving does not provide suitable contrast with surrounding paving • Natural stone tactile paving may be produced using milled Yorkstone or granite but must have SDRG approval • Metal paving studs are generally not recommended but may be adopted as an exception with SDRG approval
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STREETSCAPE GUIDANCE

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