design manual for roads & bridges

DESIGN MANUAL FOR ROADS AND BRIDGES__________________________________________________________________________________________

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The NESA ManualFebruary 1998

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VOLUME 15 ECONOMIC

ASSESSMENT OF

ROAD SCHEMES

IN SCOTLAND

SECTION 1 THE NESA MANUAL

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PART 11

INDEX AND ABBREVIATIONS

Contents

Chapter

1. Index

2. Abbreviations

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The NESA Manual

Volume 15 Section 1Part 11 Index and Abbreviations

Chapter 1Index

February 1998 11-1-1

1. INDEXSubject Part.Chapter.Paragraph

Abbreviations11.2Accident 6.4

Accident-Only Node 6.4.9, 6.6.1Costs 6.4.1, 6.5.6, 6.6.8Junctions 6.6Links 6.5Rates 6.4.2, 6.5.4, 6.6.3Types 6.5, 6.6

Combined Link and Junction 6.5.1Junctions 6.6.1, 6.6.4Link Only 6.5.1

ACCIDENT -_COSTS 10.10.2_JUNCTION 10.10.5_LINK 10.10.4_RATES 10.10.3

ADD 10.4.7Adjustment of Profiles 5.4.16All or Nothing Assignment 5.5.8Annual Average Daily Traffic (AADT) 5.4.4Annual Average Hourly Traffic (AAHT) 5.2.42, 5.4.5Annual Profiles 5.4.13ARCADY 8.2Assessment Summary 9.4ASSIGN 10.7.3Assignment -

All or Nothing 5.5.8Multiple Routeing 5.5.10Multiple User Class 5.5.15

BASE_COSTS 10.8.6BASE NETWORK 10.3.3Behavioural Value of Time 6.2.3Bendiness 7.1.13Block Time 8.6.3BUILD -

FUTURE YEAR MATRIX 10.5.30MATRICES 10.5.3NETWORK 10.3.2TREES 10.6.5

Calibration Base 2.2.3, 5.1.4Capacity -

Junctions 8.7Major/Minor Priority 8.7.2Merges 8.7.10Roundabouts 8.7.4Signalised Roundabouts 8.7.11Traffic Signals 8.7.7

Links 7.8

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The NESA Manual

Chapter 1Index


11-1-2 February 1998

Subject Part.Chapter.Paragraph

Central Areas 7.4.3CHANGE 10.4.8Classification -

Junction 8Links 7Network 5.2.3

Climbing Lanes (Dual Carriageways) 7.3.10Climbing Lanes (Single Carriageways) 7.2.11Competing Schemes 4.4Complementary Schemes 4.4Construction -

Effect of Delaying 4.5Traffic Delays 6.8.6, 6.11

Construction Costs 6.7Allocation over Time 6.8.14Calculation Sheets 6.9.2Items of Scheme Cost 6.9Land Costs 6.7.6Preparation Costs 6.8.4Property Costs 6.7.6Supervision Costs 6.8.5

Construction Delays 6.8.6, 6.11Contents 1Conversion to AAHT 5.4.5Costs -

Discounted 3.3Perceived 3.1.12Resource 3.6.1Unperceived 3.1.12

Damage Only Accidents 6.4.2Data -

Examples 10.18Format 10.2.4

Daily Profiles 5.4.11Day Types 5.4.8DEFINE FLOW GROUPS 10.5.12Delaying Construction 4.5Delays During Construction 6.8.6, 6.11Delays During Maintenance 6.8.6, 6.10.12DELETE 10.4.5DESIGN NETWORK 10.12.4Design Standard Choice 4.3Developer Funded Schemes 4.4.19Discounting 3.3Do-Minimum 3.2Do-Nothing 3.2.2Do-Something 3.2Documentation for Submissions 9.5Dual Carriageway Speed/Flow -

Rural 7.3Suburban 7.5

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Chapter 1Index



E-Factor 5.2.11Economic Assessment Report (EAR) 9.5Economic Decision Criteria 4.1Economic Concepts 3Errors -

Model 4.2.3, 9.1.5Program 10.20

Enquiries 1.5EVALUATE 10.8.4, 10.15.3Evaluation Period 3.4Examples of Data 10.18Exclusion Analysis 4.4.10Extent of Network 5.2.3

Factors -E-Factor 5.2.11Flow Factor 5.2.15Flow Group Multipliers 5.4.23Growth Factors -

Economic 6.2.14, 6.3.10, 6.4.7Traffic 5.6

M-Factor 5.2.18First Year Rate of Return 4.5.4Fixed Trip Matrix 3.5, 5.6.1, 9.5.4Flow -

Composition 5.2.26Factor 5.2.15Groups 5.2.31Group Multipliers 5.4.23Group Traffic Levels 5.4.23, 5.4.27Group Types 5.2.34Profiles 5.2.39Variation 5.2.27, 5.2.31

Forecasts -Economic 2.2.2, DMRB 13.2Traffic 5.6

Free Format data entry 10.3.10

GDP 6.2.14, 6.4.7Generalised Cost 5.5.2Generation 3.5.1Geometric Delay 5.3.16, 8.5Geometric Parameters -

Junctions 8.8Links 7.1.8

Gradient Adjustment to Fuel Consumption 6.3.4Growth -

Rate, Accident Costs 6.4.6Rate, Value of Time 6.2.14Rate, Fuel 6.3.10Traffic 5.6

GROWTH RATES 10.5.26

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The NESA Manual

Chapter 1Index




Highway Maintenance 6.10Highways Economic Note No.2 DMRB 13.2

Implicit Valuation Approach 9.4.10Incremental Analysis 4.3Index 11.1Isolation Analysis 4.4.10

Journey Time Measurements 9.3.10Junction 8

Accidents 6.6Capacity 8.7Choice8.2Delays (Assignment) 5.3.14Indices 5.3.16Interaction 8.1.4Tidality 8.1.5Types Modelled 8.3When to Model 8.1

JUNCTIONS 10.9.3

Land Cost 6.7.5Link Accidents 6.5Links 5.3.6

Overcapacity 7.8Speeds7

Local Authority Schemes 4.4.19Local Data 5.2.45Local Model Validation Report 9.1.2, 9.5.5

M-Factor 5.2.18Maintenance delays 6.10.12Major/Minor Priority Junctions 8.3.2

Capacity 8.7.2Geometric Delay 8.5.2Geometric Parameters 8.8.2

Matrix(ces) 5.4Fixed Trip 3.5, 5.6.1, 9.5.4Variable Trip 2.3.4, 3.5.3, 5.6.1

MATRIX 10.5.16_OPTIONS 10.5.7

MAXDEL 10.9.4Maximum Delay at Junctions 8.4Mean Factor Values 5.4.15MERGE 10.9.29Merges at Grade Separated Junctions 8.3.12

Capacity 8.7.10Geometric Delay 8.5.7

Minimum Speed 7.1.5, 7.8.3Modal Transfer 3.5.1

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Chapter 1Index



Motorways Speed Flow 7.3Multiple Routeing Assignment 5.5.10Multiple User Assignment 5.5.15

National Road Traffic Forecasts 5.6.7Network -

Classification 5.2.3Road 5.3Size 5.3.2

NEW_BASE 10.2.6NEW_DESIGN 10.2.6Node 5.3.4Node Expansion 5.5.7Non-Central Areas 7.4.12Non-Standard Cases 5.6.10Non-Working Time 6.2

Occupancy (car) 6.2.11OLD_BASE 10.2.6OLD_DESIGN 10.2.6Opening Years 4.6, 9.3.5 (iii)OSCADY 8.2Output 10.18Overcapacity on Links 7.8

Peak -and Off-Peak Assignments 5.4.4Flow Groups 5.2.31

Perceived Cost 3.1.12Personal Injury Accident 6.4.8Perturbation Factor 5.5.11PICADY 8.2Preparation Cost 6.8.4Present Value Year 3.3.2, 6.8.7Price Base Year 3.3.3Principles of Traffic Modelling 5.1PRINT -

ASSIGNMENT 10.16.9EVALUATION 10.16.31HFGM 10.16.26JOURNEY 10.16.27JUNC_DELAY 10.16.12LINK_FLOWS 10.16.23MATRIX 10.5.22, 10.16.4NETWORK 10.3.16, 10.4.10, 10.12.6, 10.16.3OVER_CAPACITY 10.16.20PATH 10.16.35SPEEDS 10.16.17TEER_FORM 10.16.37TREES 10.6.15, 10.16.7TURNING 10.16.15

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Chapter 1Index




PRIORITY 10.9.6Profiles

Annual 5.4.13Daily 5.4.11Flow 5.2.39

Program Availability 1.4Program Capacity 1.4.3Property Costs 6.7.5

QUADRO 6.10, 6.11Queuing Delay 8.6

Steady State 8.6.7Time Dependant 8.6.8

Ranking of Scheme Options 4.4.8Reassignment Process 5.6.11Reassignment3.5.1Redistribution 3.5.1Relative Price Factor (RPF) 6.8.11Reporting 9.5Resource Cost 3.6.1Retail Price Index (RPI) 6.8.7Risk Assessment 6.7.16Road Categories 5.3.13Road Construction Tender Price Index (RCTPI) 6.8.14Road Cost Model 6.8.10Road Geometry 7.1.8Road Network 5.3ROUNDABOUT 10.9.16Roundabouts 8.3.5


Route Choice 5.5Running the Program 10Rural Roads Speed/Flow 7.2, 7.3, 7.7

Seasonality Index 5.2.7SCHEME_COSTS 10.15.4Scheme Cost Input 6.9Scheme in Route 4.4SIGNALS 10.9.22Signalised Roundabouts 8.3.6


Single Carriageway Speed/Flow -Rural 7.2Small Town 7.6Suburban 7.5Urban 7.4

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Chapter 1Index



Single Track Speed/Flow 7.7Small Town Roads Speed/Flow 7.6Speed/Flow Curves 7.1

Diagrams 7.9Dual Carriageway 7.3Minimum Cut-Off 7.1.5Rural Single Carriageway 7.2Single Track 7.7Small Town 7.6Suburban 7.5Urban 7.4

STOP AFTER DELAY CALCULATIONS 10.8.12STOP AFTER FIRST YEAR 10.8.13Strategy Appraisal 4.4Suburban Roads Speed/Flow 7.5Supervision Cost 6.8.5SUPPRESS TABLES 10.16.38

Taxation 3.6TEMPRO 5.6.12Terminal Year 4.6.3Tidality 8.1.5Time Savings 6.2

Work 6.2.2Non-Work 6.2.2

Tolls 5.5.18Traffic Delays During Construction 6.11Traffic Flow Input 5.2, 5.4

Annual Average Daily Traffic 5.4.4Annual Average Hourly Traffic 5.2.4212 Hour 5.2.1516 Hour 5.2.15

Traffic Flow Profiles 5.2.39Traffic Flow Variation 5.2.31Traffic Forecasts 5.6

Local 5.6.10National 5.6.7

Traffic Model 5Traffic Signals 8.3.10

Capacity 8.7.7Geometric Delay 8.5.6

TRANYST 8.3.7Tree Building 5.5.6TREE_OPTIONS 10.6.6Trip Matrix 5.4

Fixed 3.5, 5.6.1, 9.5.4Variable 2.3.4, 3.5.3, 5.6.1

TURNING DELAYS 10.6.12Turning Delay (Assignment) 5.3.14Turning Flows 8.1.5

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Chapter 1Index




Uncertainty 4.2Unperceived Cost 3.1.12UPDATE NETWORK 10.4.2, 10.12.3Urban Roads Speed/Flow 7.4User Classes 5.2.23

Validation of a NESA Assessment 9.1Value of -

Accidents 6.4, 6.5, 6.6Time 6.2Fuel 6.3.4

Variable Trip Matrix 2.3.4, 3.5.3, 5.6.1VAT 3.6Vehicle -

Categories 5.2.26Category Proportions 5.2.28Occupancy 6.2.11Operating Costs 6.3

Working Time 6.2.2

Zones 5.3.3ZONES 10.3.4Zone Connectors 5.3.3

Note: NESA Commands in capitals.

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The NESA Manual


Chapter 2Abbreviations


2. ABBREVIATIONS

AADT Annual Average Daily Traffic FlowAAHT Annual Average Hourly Traffic FlowACTRA Advisory Committee on Trunk Road AssessmentARCADY Computer Program for the Design of RoundaboutATC Automatic Traffic CountATCS Automatic Traffic Classifier Site

BCR Benefit to Cost Ratio

CBA Cost Benefit AnalysisCBD Central Business DistrictCOBA COst Benefit Analysis computer program

DOT Department of TransportDMRB Design Manual for Roads and Bridges

EAR Economic Assessment ReportEPP Engineering Policy and Programme

FYRR First Year Rate of Return

GDP Gross Domestic Product

HA Highways AgencyHEN1 Highways Economic Note No.1 - Road Accident CostsHEN2 Highways Economic Note No.2 - VOT and VOCHETA Highways Economic and Traffic Appraisal Division DOT

IHMS Integrated Highways Maintenance System

LGV Light Goods Vehicle

MCC Manual Classified Count

NPV Net Present ValueNRTF National Road Traffic ForecastsNTS National Travel Survey

OGV Other Goods VehicleOGV1 Other Goods Vehicle - Category 1OGV2 Other Goods Vehicle - Category 2OSCADY Computer Program for the Design of Traffic Signals

PHV Percentage Heavy Vehicles (OGV1 + OGV2 + PSV/COACH)PIA Personal Injury AccidentPICADY Computer Program for the Design of Priority JunctionsPSV Passenger Service VehiclePVB Present Value of BenefitsPVC Present Value of CostsPVY Present Value Year

QUADRO QUeues And Delays at ROadworks computer program

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The NESA Manual

Chapter 2Abbreviations



RCTPI Road Construction Tender Price IndexRPF Relative Price FactorRPI Retail Price Index

SACTRA Standing Advisory Committee on Trunk Road Assessment

TAM Traffic Appraisal ManualTEMPRO Trip End Model Presentation pROgramTRANSYT Computer Program for the optimisation of Linked Traffic SignalsTRL Transport Research Laboratory (formerly TRRL)TRRL Transport and Road Research Laboratory

URECA URban EConomic Assessment

VAT Value Added TaxVOC Vehicle Operating CostsVOT Value of Time

design manual for roads & bridges

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