Rutu Buddhdev Amara Land Ltd 147 Herkomer Road Bushey Hertfordshire WD23 3LH
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Rutu Buddhdev Amara Land Ltd 147 Herkomer Road Bushey Hertfordshire WD23 3LH By email: [email protected] Unit 23 The Maltings Stanstead Abbotts Hertfordshire SG12 8HG 10th December 2020 Tel 01920 871 777 e: [email protected]@eastp.co.uk www.eastp.co.uk Dear Rutu, Transport Note: Ridge Hill, Shenley WD7 Thank you for appointing EAS Transport Planning Ltd to provide highways advice in response to planning application for a maintenance and long-term storage access to the north-west of the development site to the south of the B556. The site is located immediately to the south of the B556, to the west of South Mimms and north of Ridge and Shenley. The site lies within the administrative boundaries of Hertsmere District Council (the local Planning Authority, hereinafter referred to as ‘HDC’) and Hertfordshire County Council (‘HCC’, as the local highways authority and statutory consultee). A Location Plan is contained within Appendix AA. The Proposed Scheme It is proposed to provide a maintenance and long-term storage area to serve the attenuation pond attributed to the residential development off Rectory Road. Due to the significant level difference between the residential site area and the attenuation pond area, it will be necessary to access this maintenance/storage area directly off B556. The proposed access is in the form of a bell-mouth junction measuring 5m wide with 4.5m kerb radii on either side. The maintenance/storage area is to be used for servicing of the pond as well as some long-term storage (mostly to serve the maintenance of the same pond itself). The trip generation related to the use of the site will therefore be very minimal, in the order of once or twice a month, and will have negligible impact on the local traffic levels. The proposed access onto the B556 is shown within the architectural proposal contained within Appendix BBB.B The Existing Site and the Surrounding Areas The site is currently an undeveloped parcel of land. In the vicinity of the residential site, there are a number of private residential houses and a primary school. These are accessed off Rectory Lane, which joins B556 approximately 300m to the east of the proposed maintenance/storage access. The B556 is an unrestricted single carriageway, where the local applicable speed limit is therefore of 60mph. The site is fronted by a 2m wide verge and a footway which crosses to the opposite side of the road circa 100m to the east of the proposed access. Considering the limited development locally, this footway EAS is a Trading Name of EAS Transport Planning Ltd Registered in England and Wales No.5751442 typically serves pedestrians on longer walks, rather than for local access, as no shops are available within 2km from the site. It is noted that the site will not be used by sustainable modes of travel as this will only be accessed very irregularly for servicing and long-term storage purposes only, which can only be undertaken through the use of large vehicles. There are therefore no additional requirements for sustainable travel infrastructure at this location. The Proposed Site Access The maintenance area will require servicing about once a month, using an 11m rigid vehicle. A Swept Path Analysis exercise showing this vehicle entering and egressing the site in forward gear was therefore undertaken. This swept path analysis exercise is shown within AppendixAppendix CCC.C A review of the local highway land ownership was also undertaken, and it is noted that the access will lie within highway boundary and as such would be subject to a S184/S278 Application should planning permission be granted. A map of the highway land ownership is contained within Appendix DD. The junction visibility splay was also reviewed as part of this access review. It is noted that the full 2m x 215m, as required by the Design Manual for Roads and Bridges is available in both directions. The junction visibility drawings are contained within Appendix EE. The access was further analysed through a Stage 1 Road Safety Audit exercise, which noted that left-in/ left-out manoeuvres by HGVs will likely require the overrunning of the opposite lane, which would be considered to be a safety issue, even for such an irregular use. It is therefore agreed with the Auditors that such movements by large vehicles are restricted through the use of a Servicing Management Plan, which will be provided to servicing drivers, who will be asked to approach the site from the west, and undertake a right-turn movement to drive into the site, when using 11m long HGVs. It is also proposed that on exiting the site, the drivers also continue travelling on the eastbound lane, avoiding a left-turn out of the site. Furthermore, the Road Safety Auditors proposed the introduction of warning signage for drivers approaching from either direction, to highlight the potential for slow moving HGVs turning in and out of the site. The Road Safety Audit and the Designer’s Response document are contained within Appendix FF. Summary and Conclusions EAS Transport Planning has been appointed to provide highways advice in relation to the proposed access into the maintenance area to the north of the residential development off Rectory Lane. Due to topographic arrangement between the two parcels of land, it is proposed that the maintenance area takes access off the B556, which is closer in level with the proposed maintenance/storage site. The proposed 5m wide access will enable an 11m long rigid HGVs to enter and exit the site in forward gear, entering and exiting the site from the eastbound lane only (right-in/right-out manoeuvre). A Servicing Management Plan is proposed to be developed following the granting of planning approval, to outline these access arrangement requirements. Registered in England and Wales No.5751442 Concluding, in terms of highways, it is noted that this proposed access can be made safe for use by 11m HGVs and be policy compliant. Yours Sincerely Joseph Mercieca | CIHT ARB MSc (Transport) BE&A (Hons) Principal Engineer Encl.: Appendix: A – Site Plan Appendix: B – Architectural Proposals Appendix: C – Swept Path Analysis Appendix: D – Map of Highway Land Appendix: E – Junction Visibility drawings Appendix: F – Road Safety Audit & Designer’s Response Registered in England and Wales No.5751442 Appendix: A ––– Site Plan Registered in England and Wales No.5751442 Ridge Hill Riding School Stables Ridge Hill, Shenley, Radlett WD7 9BG Site Source: www.streetmap.co.uk Appendix: B ––– Architectural Proposals Registered in England and Wales No.5751442 BT 5m + 113.000 2m drop bank 114.400 114.000 114.600 114.400 114.200 113.800113.600 + 114.400 114.400114.000 114.000 114.200 114.800 + 113.500 113.800 114.000 113.600 + 114.400 114.000 114.600 IL 114.950 113.600 114.200 113.800 + 115.000 114.400 114.000 114.400 113.800 114.000 114.000114.200 113.200 114.400 114.400 113.400 114.200 113.600113.800114.000 150mmØ 1/8.5 150mmØ 1/72 150mmØ 1/72 MD 1.011 IL 114.640 100mmØ 1/9 54450 [178'-8"] SW11 CL 121.000 IL 120.350 IL 120.425 FW16 CL 122.000 IL 121.000 IL 121.075 150mmØ 1/8.6 100mmØ 1/4 100mmØ MD 1.010 r.w.p. 150mmØ 1/80 +123.700 SW13 FW15 CL 121.000 CL 123.700 IL 120.675 IL 122.595 cavity closer SW09 aav +123.50 100mmØ 1/80 CL 123.700 IL 120.750 IL 122.660 IL 122.950 Gullies provided to drain access and capture exceedance flows FW14 from porous surfacing area aav CL 123.700 r.w.p. aav r.w.p. 1 +123.850FFL 2 3 4 IL 122.750 5 6 IL 123.025 7 100mmØ 1/40 8 8 150mmØ 1/75 7 150mmØ 1/8 6 r.w.p. 5 4 MD 1.009 3 2 IL 122.825 1 FW13 +123.700 cavity closer r.w.p. SW08 aav CL 123.700 SW10 CL 124.200 r.w.p. IL 122.939 100mmØ 1/80 G CL 123.700 IL 123.220 r.w.p. G IL 123.125+123.850FFL r.w.p. +123.700 100mmØ 1/60 100mmØ 1/80 IL 123.175 IL 123.295 r.w.p. G IL 123.100 FW12 RE 100mmØ 1/40 CL 123.700 CL 123.700 CP09 MD 1.008 IL 123.350 CL 124.400 IL 123.025 Proposed flow control by+125.00 G IL 123.570 100mmØ pipe laid invert to SW12 BL 123.270 100mmØ 1/80 +124.550 invert in catchpit chamber CL 123.700 +124.400 IL 123.250 G r.w.p +124.700 external tap +125.16 +124.300 s.v.p RE 150mmØMD 1/100 1.007 CL 124.700 CP08 IL 124.350 gully 1 CL 124.500 2 3 4 RE IL 123.750 +124.850FFL +125.250 CCU r.w.p CL 125.000 Proposed porous surfacing system. +124.500 BL 123.450 SW07 GB.I.G 100mmØ 1/60 IL 124.650 80mm (min) porous asphalt on; r.w.p FW11 CL 124.850 50mm laying course on; CL 124.700 IL 124.105 porous geotextile on; +124.700 IL 123.370 s.v.p 80mm temporary DBM layer on; 150mmØ 1/65 IL 124.180 r.w.p FW10 minimum 450mm clean stone on; 100mmØ 1/22 CL 124.700 +124.850FFL impermeable geomembrane MD 1.006 100mmØ 1/22 IL 123.770 r.w.p B.I.GG CCU external tap +126.000 100mmØ 1/42 gully +125.000 r.w.p RE CL 125.000 SW06 +126.02 100mmØ 1/80 IL 124.650 CL 124.850 s.v.p 100mmØ 1/80 G IL 124.400 4 3 RE 2 1 Proposed porous surfacing system +125.150FFL r.w.p CL 125.650 increased to minimum 450mm IL 12.030 r.w.p IL 125.300 clean stone at low point CP07 +125.650FFL FW09 s.v.p CL 124.750 CL 125.000 +125.650 IL 123.980 IL 123.875 FW08 +125.000 BL 123.680 +125.27 CL 125.000 external r.w.p 100mmØ 1/80 tap 150mmØ 1/65 B.I.G r.w.p IL 124.000 G CCU RE gully MD 1.005 CL 125.650 100mmØ 1/58 IL 125.300 r.w.p s.v.p r.w.p 4 SW05 3 2 CL 125.650 100mmØ 1/60 IL 124.300 Appendix: C ––– Swept Path Analysis Registered in England and Wales No.5751442 TRACKING VEHICLE MODEL: 11 0.889 5.766 1.372 1.372 11m flatbed 11m flatbed Overall Length 11.000m Overall Width 2.600m Overall Body Height 2.679m Min Body Ground Clearance 0.445m Track Width 2.600m Lock to lock time 6.00s Kerb to Kerb Turning Radius 13.137m BT 5m REV DATE BY DESCRIPTION CKD APP + 113.000 2m drop bank 114.400 DRAWING STATUS: FOR PLANNING 114.000 114.600 114.400 Ordnance Survey (c) Crown Copyright 2018.