Supplementary Stage 1 Road Safety Audit Designer's Response

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M1 Junction 19 Improvement Stage 1 Road Safety Audit Designer’s Response / Exceptions Report Exception No exception is sought at this stage; although an exception may be sought at the next stage of design development for reduced visibility should the issue be raised in subsequent Road Safety Audits. Problem 2 - Additional vehicles using this route A426 between M1 J20 and M6 J1 Problem The proposed junction layout removes the ability for vehicles to travel from M1 Southbound to M6 Westbound and from M6 Eastbound to M1 Northbound. Any vehicles that previously made either of these movements will now have to use the A426. The auditor is unsure whether the capacity of this route and junctions will be suitable for the additional vehicles. Recommendation Provide assessment of impact of scheme on A426. Designer’s Response The Preferred Route has been developed based on traffic forecasting. This identified that existing demand and forecast flows for the M6 westbound to M1 northbound and M1 southbound to M6 westbound movements are currently and forecast to be very low. The alternative route for these movements using the strategic road network is the M69 and the A426. A comparison of the forecast traffic flows on the A426 in the do-minimum scenario (no junction improvement) and the do-something scenario (following improvement to the junction) in both the opening year (2014) and the design year (2029) indicate a small reduction in traffic along the A426. This is considered to be due to traffic currently bypassing M1 Junction 19, transferring to the motorway network following removal of the congestion and delay currently encountered at M1 Junction 19. Exception No exception required. Rev.:1 4 Issued: February 2010
M1 Junction 19 Improvement Stage 1 Road Safety Audit Designer’s Response / Exceptions Report Problem 3 - Potential ponding Approach to junction of Swinford Road and Local Link Road Problem The approach to the junction on Swinford Road goes downhill to go underneath M1 – M6 Northbound, M6 – A14 and M6 – M1 Southbound Links, before going uphill to the T junction. The lowest point is under S/9 M6 – A1 Link and thus there is potential for ponding to occur at this location. Flooding in this location could lead to loss of control of vehicles and potential damage to structures if vehicles leave the carriageway. Recommendation Ensure adequate drainage facilities are provided on Swinford Road. Designer’s Response Initial drainage proposals reported in the “Contractors Proposals for Drainage” propose a gravity drainage network (no pumping station) for the trapped cutting. At detailed design, the pipe network and gully spacing will be designed in accordance with the requirements of HD33/06 which requires the drainage system to accommodate a larger storm event for trapped cuttings. Exception No exception required. Rev.:1 5 Issued: February 2010
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Supplementary Stage 1 Road Safety Audit Designer's Response

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