M25 Managed Motorways J16 - Highways Agency

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allows more accurate quantification of the costs. At the end of each scheme stage, thenet present value and benefit cost ratio of the scheme are recalculated on the basis ofthe latest scheme costs before a decision is made by the Highways Investment Board toproceed to the next stage.It should be noted that the standard appraisal period for transport schemes is 60 years.However, in the case of CM schemes, the useful life of the assets is 30 years and so 30years is the assumed appraisal period.WebTAG and the HA’s IAN require that the costs and benefits of transport projects arevalued at 2002 prices and discounted to 2002. However, for the purpose of this ImpactAssessment these have been converted to 2010 prices (representing a recent year forwhich HM Treasury GDP inflation factors are available) and discounted to a presentvalue year of 2011.Monetised CostsAll Controlled Motorway schemes have the following types of financial costs. All costsare incurred by government:TRANSITION: Cost of Installation;RECURRING: Cost of Enforcement of VMSL;RECURRING: Cost of Maintenance and Operation;RECURRING: Cost of Renewing electronic equipment after 15 years.In terms of non-financial costs, Controlled Motorway schemes are appraised in terms ofa range of potential impacts as set out in WebTAG and the HA’s IAN Appraisal ofTechnology Schemes. As mentioned in 5.2, the impacts which must be consideredcome under the three main headings of Economy, Environment and Society which areeach then subdivided into a number of sub-impacts. Those sub-impacts which arerelevant to Controlled Motorway schemes are limited to journey times, journey timereliability and accidents.The relevant sub-impacts have been assessed and the proposed scheme has no nonfinancialcosts to add to the financial costs of installation etc described above. Normally,a CM scheme would have a cost to Transport Economic Efficiency (journey times andvehicle operating costs) during construction. In this case however, the CM equipmentwill be installed as part of the motorway widening project. As such, there are noadditional roadworks required.Transition: Installation CostsThe overall installation cost for Controlled Motorways on the M25 J16 to J23 is £11.4m(2010 Constant Market Prices – Undiscounted). This includes Preparation, Supervisionand Works costs. Preparation costs cover expenditure on the scheme design andpreparation of tender documentation. Supervision costs cover the cost of the HA'sdesign agent supervising the contract on behalf of the HA. Works expenditure is thecost of materials and labour for constructing the scheme.30
The current capital cost of installing the Controlled Motorway scheme is derived througha standardised cost estimation process designed and undertaken by the HighwaysAgency. The designer supplies details of the scheme to the Highways AgencyCommercial Team who apply standard rates and return the cost estimate to thedesigners. This estimation process is refined as the scheme preparation processproceeds. The current estimate was prepared at Works Commitment stage and is thefinal most accurate estimate produced.Recurring: Enforcement CostsEnforcement costs have been derived using the Highways Agency Managed MotorwaysOperational Cost Model spreadsheet.The average annual enforcement cost of £0.1m over 30 years (2010 Constant MarketPrices – Undiscounted), includes costs paid by the HA to cover the costs incurred by theHome Office in processing fixed penalty notices or prosecuting offenders.Recurring: Maintenance and Operating CostsMaintenance and operating costs have been derived using the Highways AgencyManaged Motorways Operational Cost Model spreadsheet.The average annual maintenance and operating costs are £0.4m over 30 years (2010Constant Market Prices – Undiscounted). These include the costs associated with themaintenance of gantries, signs, loops and cabinets, plus specialist IT hardware andsoftware.Recurring: Renewal CostsRenewal costs have been derived using the Highways Agency Managed MotorwaysOperational Cost Model spreadsheet.The average annual renewal cost of £0.4m over 30 years (2010 Constant Market Prices– Undiscounted), is based on replacing all electrical equipment at expiry of a 15 yearoperational life.Non-Monetised CostsThe proposed scheme has no unmonetised costs.Monetised BenefitsThe proposed scheme has the following monetised benefits. There are no monetisedbenefits during Transition ie installation:RECURRING: Benefits to Journey Time Reliability through a reduction in day to day journeytime variability;RECURRING: Benefits to Road Safety through a reduction in accidents;Reducing accidents leads to the following additional benefits:31
Page 1: M25 Controlled Motorway January 201
Page 4 and 5: Getting to thisstage:In November 20
Page 6 and 7: Executive SummaryThis consultation
Page 8 and 9: Annex AConsultation Paper - Control
Page 14: Annex AConsultation Paper - Control
Page 21 and 22: Title:M25 J16-23 Controlled Motorwa
Page 23 and 24: Evidence Base17
Page 25 and 26: 2. Rationale for InterventionThe Hi
Page 28 and 29: 4. Description of Options22
Page 30 and 31: 4.2 Option 1 (Preferred): Controlle
Page 32 and 33: 5. Details of Costs and Benefits26
Page 34 and 35: 5.2 Option 1 (Preferred): Controlle
Page 38 and 39: RECURRING: A reduction in incident
Page 40 and 41: 6. Rationale and Evidence for Propo
Page 42 and 43: 8. Direct Costs and Benefits to Bus
Page 44 and 45: 9.1 Justice SystemIn Controlled Mot
Page 46 and 47: 10. Recommendation, Implementation
Page 48 and 49: 10.2 Implementation PlanThe optimum
Page 51 and 52: Annex 1: Post Implementation Review
Page 53 and 54: Member of the publicOther (please d
Page 55 and 56: Company Name Recipient Address Emai

M25 Managed Motorways J16 - Highways Agency

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