Highway Engineering 2 min read
Highway CBA worked example
Introduction It is proposed to upgrade an existing single carriageway road to a dual carriageway and to improve some of…
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Highway Engineering 4 min read
Use of economic indicators to assess basic economic viability
Once the two parameters of project life and discount rate are set in place, these allow all costs and benefits…
Highway Engineering 4 min read
Economic life, residual value and the discount rate
A highway project is often complex and long term, with the costs and benefits associated with it occurring over a…
Highway Engineering 5 min read
Identifying all relevant costs and benefits
The application of cost-benefit for project assessment in the highway area is made more complicated by the wide array of…
Highway Engineering 4 min read
Cost-benefit analysis (CBA)
Introduction Within Europe, the method usually adopted for the economic evaluation of highway schemes, termed cost-benefit analysis, utilises the net…
Highway Engineering 5 min read
Scheme Appraisal for Highway Projects
Introduction Once a transportation plan has been finalised and the demand along each of its highway links has been established,…
Highway Engineering 3 min read
A full example of the four-stage transportation modelling process
Trip production Assume a study area is divided into seven zones (A, B, C, D, E, F, G) as indicated…
Highway Engineering 4 min read
Trip distribution
Introduction The previous model determined the number of trips produced by and attracted to each zone within the study area…
Highway Engineering 4 min read
Trip generation
Trip generation models provide a measure of the rate at which trips both in and out of the zone in…
Highway Engineering 7 min read
Forecasting Future Traffic Flows
Basic principles of traffic demand analysis If transport planners wish to modify a highway network either by constructing a new…