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AADT |
Annual Average Daily Traffic |
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AP |
All-Purpose trunk road |
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BCR |
benefit : cost ratio |
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Casualty |
Person sustaining a Fatal, Serious or Slight Injury in a PIA |
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CBA |
Cost-Benefit Analysis or Central Business Area |
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CF |
Commuter Factor - ratio of Peak to Off-Peak Flow (2-way) |
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C/L |
climbing lane |
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CO2 |
carbon dioxide |
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D2M |
dual carriageway, two lane motorway |
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D3M |
dual carriageway, three lane motorway |
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D4M |
dual carriageway, four lane motorway |
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D2AP |
dual two lane carriageway, all purpose road |
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DBFO |
Design, Build, Finance and Operate |
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DMRB |
Design Manual for Roads & Bridges |
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D/C |
dual carriageway |
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EC |
European Community |
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EIA |
Environmental Impact Assessment |
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FRB |
Forth Road Bridge |
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FYRR |
First Year Rate of Return |
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HGV |
heavy goods vehicles |
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LA |
local authority |
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M |
Motorway |
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N/A |
information not available or not applicable |
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NAQS |
National Air Quality Strategy |
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NESA |
Scottish Executive Network Evaluation Program |
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NMU |
Non-Motorised User (Pedestrian/ Walker, Cyclist or Equestrian) |
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NO2 |
nitrogen dioxide |
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NPV |
net present value |
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Objective 1 |
European Union Objective 1 Area |
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PIA |
Personal Injury Accident |
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pop. |
population |
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PM10 |
particulate matter generally 10 microns or less in size |
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PT |
public transport |
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PVB |
present value of benefits |
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PVC |
present value of costs |
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PV/PVC |
ratio of present value of a particular benefit to present value costs |
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QUADRO |
Queues and Delays at Roadworks (Computer Program) |
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Ramsar |
an internationally important |
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Site |
wetland site |
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Rechar II |
European Community initiative to assist the economic and social conversion of coal mining areas affected by mine closures |
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S2 |
single carriageway, two lane road |
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S4 |
single carriageway, four lane road |
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SACTRA |
Standing Advisory Committee on Trunk Road Assessment |
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S/C |
Single Carriageway |
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SSSI |
Site of Special Scientific Interest |
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TERN |
Trans-European Road Network |
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TREVAL |
Trunk Road Evaluation (Computer Program) |
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TRIPS |
Traffic Modelling Computer Program/Suite |
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UR |
Unemployment Rate (average for areas served by improvement) |
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URECA |
Urban Economic Assessment (Computer Program) |
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VAT |
Value Added Tax |
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vpd |
Vehicles per Day |
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VOC |
Vehicle Operating Cost |
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WS2 |
Wide Single 2 lane Carriageway |
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WS(2+1) |
Wide Single Carriageway with 2 lanes in one direction, 1 lane in other |
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ZG |
Zero Growth. Hypothetical scenario of traffic flows held at current levels. |
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