A Brief Note On The Iraqi Highway Design Manual Of Meet The Present And Growing Needs

1643 WordsApr 30, 20167 Pages
expressways, should be include the recognition of an existing description to meet the present and growing needs in the future. This problem will result in a series of actions, starting with searching out the data and screening geographic areas and specific locations. Routes that satisfy the screening criteria are subject to detailed evaluation, economic, demographic, facility condition, and systems performance data may be kept in a variety of forms, tabular databases, images and maps [9]. The Iraqi Highway design manual of 1982 grouped roads into a three-level; hierarchy of primary, secondary and tertiary highways. There is a secondary classification which has roads grouped into one of 4 classes (A, B, C, D). The allocation of a road to a classification determines factors such as its design speed, total width of highway and design capacity etc. [5] (Tab.1) The expressway system in Iraq appears to be in fair condition, and the primary and secondary roads, most of which are in average condition, were designed over twenty years ago. However, in the intervening years, there has been limited maintenance, consistent overloading of freight trucks, and excessive use by heavy military vehicles. This resulted in a significant backlog of maintenance, which only began to be addressed in 2000 when a modest budget was allocated to implement an initial maintenance program [1] [4] [10].While about 50% of the expressway system is considered to be in fair conditions, the percentage of primary
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