@article{ref1,
title="Development Level of Analysis for Road Cost Models",
journal="Baltic journal of road and bridge engineering",
year="2006",
author="Jamshid, Sodikov",
volume="1",
number="3",
pages="129-134",
abstract="In early estimates for highway construction and maintenance projects, there is a compromise between the amounts of information available and accuracy of estimation. This paper proposes a method for developing comprehensive road cost models that provide better prediction accuracy and use efficient data usage according to the level of analysis. The data for this research were obtained from the World Bank’s Road Costs Knowledge System (ROCKS) database, which contains unit costs for road projects from over 80 developing countries. This method should allow planners and decision-makers to estimate accurately the unit cost in various cost studies and to conduct cost studies at different levels of analysis (regional, country and project). Regional- and country-level road cost models are useful for preliminary cost studies, but project-level models can be used during feasibility studies.<p />",
language="",
issn="1822-427X",
doi="",
url="http://dx.doi.org/"
}