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Economic Decision Model Software - Reference Materials |
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Infrastructure
Note - rt1.pdf (70
kb Technical Note)
Typical Unpaved Roads Roughness
Predicted By the HDM-III Model
Rodrigo S. Archondo-Callao
Abstract:
The Highway Design and Maintenance Standards
Model, HDM-III, based on the Brazil-UNDP
field study conducted between 1976 and 1981,
predicts the average annual road roughness
of engineered unpaved roads as a function
of five variables - traffic volume, material
properties, road geometry, environment and
grading frequency. This note presents examples
of HDM-III predictions for a lateritic gravel
road and for an earth road, and may be used
more generally as a guide for the estimation
of roughness of unpaved roads when more
precise measurements are not available.
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Infrastructure
Note - rt2.pdf (29
kb Technical Note)
Unpaved Roads' Roughness Estimation
by Subjective Evaluation
Rodrigo S. Archondo-Callao
Abstract: Road agencies need to estimate road
roughness when determining the economic evaluation
of proposed maintenance and upgrading options,
and in pavement management systems for planning
and programming purposes. Instrumented measurement
of roughness is desirable, but when instrumented
measurement is not feasible, for example in
the case of unpaved roads, recourse must be
made to subjective estimation. This note presents
two approaches to subjective estimation, both
based on the World Bank's work in the development
of the Highway Design and Maintenance Standards
Model, HDM-III, and the Highway Development
and Management Model, HDM-4.
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Infrastructure
Note - rt3.pdf (72
kb Technical Note)
Paving of Unpaved Roads Economically-Justified
Paving Costs
Rodrigo S. Archondo-Callao
Abstract: Under certain circumstances, paving
of unpaved roads may be economically justified.
To help road agencies identify unpaved roads
that may be potential candidates for paving,
this Note presents typical scenarios in which
paving may be examined as a valid investment
option. This procedure should be considered
no more than a first screening process, and
candidate roads that pass this first screening
should thereafter be subject to further investigation
that would include a more rigorous economic
evaluation and evaluation of other aspects
of the proposed paving, notably the environmental
and social aspects. Candidate roads that did
not pass this first screening would not be
subject to further examination, at least not
for the time being, and candidate roads with
marginal economic feasibility should be subject
to a more rigorous economic evaluation with
refined data.
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Infrastructure
Note - rt4.pdf (395386 kb Technical
Note)
Designing a Rural Basic Access Road
Project: The Case of Andhra Pradesh, India
Dieter Schelling and Zhi Liu
Abstract: Conventional road project design
and appraisal methodology has some serious
limitations when it is applied to rural basic
access road projects, particularly those aiming
to achieve both social equity and economic
efficiency objectives. These limitations can
be overcome by the use of participatory approaches
and other practical tools.
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Infrastructure
Note - rt5.pdf (38 kb Technical
Note)
Economic Analysis of a Rural Basic
Access Road Project: The Case of Andhra Pradesh,
India
Zhi Liu
Abstract: Rural basic access road projects
are expected to yield substantial social benefits,
which cannot be properly evaluated using conventional
cost-benefit analysis methodology. This note
describes the application of costeffectiveness
analysis to supplement cost-benefit analysis
in the evaluation and selection of road works
for financing under a Bank rural road project
in the State of Andhra Pradesh, India.
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Infrastructure
Note - Value of Time.pdf (45
kb Technical Note)
The Value of Time In Economic Evaluation
of Transport Projects Lessons from Recent
Research
Kenneth M. Gwilliam
Abstract: There are currently no general guidelines
on the valuation of time, which is consequently
often omitted in the economic evaluation of
Bank transport projects. On the basis of a
review of recent research this note suggests
an appropriate approach where standard values
are not available from government sources.
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Technical
Paper - 496.pdf (1801 kb Technical
Paper)
Design and Appraisal of Rural Transport
Infrastructure: Ensuring Basic Access for
Rural Communities
Jerry Lebo and Dieter Schelling
Abstract: Isolation contributes to rural poverty.
Without a minimum of reliable and efficient
access to locations of basic social and economic
activities, rural life stagnates and local
development prospects remain limited. Providing
and maintaining a minimum level of access,
referred to in this paper as basic access,
is therefore a necessary element of any rural
development strategy. Overcoming isolation
necessitates holistic strategies. Approaches
include improved logistics to support trade
and communication, the promotion of transport
services and intermediate means of transport,
improved quality and location of services,
and the sustainable provision of cost effective
transport infrastructure. Among these, the
cost-effective design and appraisal of rural
transport infrastructure (RTI) is the topic
of this paper
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Documentation
- HDM-III Model Volume 1.pdf (13252
kb Model Documentation)
The Highway Design and Maintenance
Model - Description of the HDM-III Model
Thawat Watanatada, Clell G. Harral, William
D. 0. Paterson, Ashok M. Dhareshwar, Anil
Bhandari, and Koji Tsunokawa
Abstract: This volume is one in a series that
documents the results of the HDM-III study.
The Highway Design and Maintenance Standards
Study (HDM-III) has focused both on the rigorous
empirical quantification of the tradeoffs
between the costs of road construction, road
maintenance, and vehicle operation awnd on
the development of planning models incorporating
total life-cycle cost simulation as a basis
for highways decision making.
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DETOUR10
Deterioration of Unpaved Roads (ver 1.00).XLS
(214 kb Excel Model)
Deterioration of Unpaved Roads Model
Using HDM Relationships Rodrigo S.
Archondo-Callao
Abstract: The Deterioration of Unpaved Roads
Model (DETOUR) implements in Excel the road
deterioration relationships for unpaved roads
of the Highway Design and Maintenance Standards
Model (HDM-III).
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