Marlborough District Council Roading Assets - Activity Management Plan 2015 - 2018 SECTION 1 EXECUTIVE SUMMARY iii. Desired Level - the existing level of service for roughness / smooth travel exposure is good and well aligned with community expectations. Increasing expenditure to further improve roughness is not considered necessary or justifiable. Current levels of service which may not be fully aligned with community expectations are: The demand for asphaltic concrete in urban areas: The AMP will need to consider different surfacing techniques and the funding of higher quality surfaces. New policy is that roads that are carrying more than 7,500/vehicles per day are surfaced with asphalt. Other roads are surfaced with the more traditional chip seal. Council will need to consider whether chip seals are appropriate, especially within urban areas. Asphalt surfaces are smoother and much quieter but costs for an enhanced level of service are at least 10x that of a chip seal surface. The likely cost of using asphalt for all urban resurfacing is likely to be significant i.e. in excess of $2.0M per year. Pot holes and surface detritus: This also may not be fully aligned with community expectations, especially for pedestrians and cyclists. Improving the levels of service for pot holes and detritus i.e. introducing a ‘zero’ pot hole / detritus strategy, could cost as much as $250k per year but is dependent on whether the strategy is targeted to specific road groups, urban area etc. iv. Reduced Level - the existing levels of serv ice are currently well aligned, or marginally below community expectations. Performance modelling res ult s cindiate that areuctidon inthe curent leelr v of expenditure will result in a deterioration in pavementc oonditi n and a subsequent increae isn maintenance repairs. The following modelling output graphs demonstratethe effectsof edcreaings the level of investment. Predicted Surface Integrity Index 30 OptimalModel_1_VeryHigh 25 OptimalModel_3_Normal OptimalModel_5_VeryLow TriggerBasedModel 20 15 10 5 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Effect of various budget scenarios on surface condition Figure 6.1.8.1a Predicted Routine Maintenance Costs 1200 OptimalModel_1_VeryHigh OptimalModel_3_Normal 1000 OptimalModel_5_VeryLow TriggerBasedModel 800 600 400 200 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Year Effect of various budget scenarios on maintenance costs Figure 6.1.8.1b 30 September 2014 Page 45 of Section 1 )0001$ x( tsoC