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 136 Blister paving at uncontrolled crossings – uncontrolled crossings are used where vehicle flows and speeds allow pedestrians safe opportunities to cross a street without the need for a formal facility such as a signal crossing or zebra. 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, 800mm wide at the narrowest point across the full width of the flush crossing • Blister paving should be oriented to align with the direction of the crossing Figure 132: Tactile paving must have a 50 per cent contrast with the surrounding footway material • Exceptionally, the back of the crossing tactile paving may not need to be oriented at right angles to the crossing, and may be cut to be consistently 800mm from the kerb edge. This must be reviewed and approved by the technical approvals manager on a case-by-case basis • Tactile tails should not be provided • Tactile paving associated with separate crossings should not join as this impacts on legibility • 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 • Contrasting grey – charcoal grey is standard on the TLRN for uncontrolled crossings • Natural stone if tactile paving produced with milled granite/Yorkstone and as approved by SDRG TLRN departures from national guidance The following departures from national guidance should be used by designers working on TLRN schemes when designing tactile paving at uncontrolled crossings: • Exceptionally, where the area covered in tactile paving will be unnecessarily extensive or illegible due to a high radii kerb line combined with an abnormally wide crossing, tactile paving should be cut to be consistently 800mm from the kerb edge. Each location is to be assessed and approved by the technical approvals manager individually at the detailed level • Research shows that partially visually impaired people often use the contrasting colour of tactile paving to guide them through the streetscape. However, there is less evidence that the specific colour used makes the space more legible. As such, the use of alternative contrasting coloured tactile paving will be considered on a case-by-case basis, for instance, in conservation areas or where the ‘standard coloured’ tactile paving does not contrast with the surrounding paving • The use of reduced width tactile paving at the kerb edge in all cases (800mm instead of 1,200mm). Research undertaken in 2010 by University College London concluded that ‘the blister profile is readily detectable when it is 800mm wide’ as it will always capture a person’s stride. We have therefore reduced the width used for all tactile paving surfaces from 1,200mm to 800mm; two rows of 400x400mm flags (reduced from three in certain circumstances)
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 Recording departures from national guidance Consistency in application is of fundamental importance for legibility and so any deviations from national guidance and the national approach to tactile provision should be carefully justified. Project files must record the reason for not following the national guidance. This includes recording how Streetscape Guidance has been followed in respect of the aforementioned departures from national guidance. Figure 133: Uncontrolled pedestrian crossing at a side road [Part E – Physical design and materials] Crossings 137
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STREETSCAPE GUIDANCE

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