The average cost of annual road system is sum of all costs like average cost of highway administration, operation and maintenance and also recovery fund.

As on April 2009, twenty five projects have been sanctioned and nine projects were completed by April 2009 and in or proposals 42 projects were remaining in which 5 are completed.

?a? is running cost per unit distance, ?b? is a fixed hourly cost and ?c? is portion of cost depending on speed.

The ratio of annual benefit from improvement to annual cost of improvement is called benefit cost ratio, benefit is profit, cost is investment and maintenance cost is after investment.

The compound interest is calculated for every year and it?s leived on preceding interest.

The UI is unevenness index and IRI is international roughness index, UI is in mm/km and IRI is in m/km.

As re is an increase in unevenness index, re is no substantial increase in speed, instead it decreases.

The benefits are classified into two types namely tangible and intangible benefits, tangible are which can be measured and intangible are related to social aspects.

The floating car method is a method that is used for estimation of traffic, whereas remaining are methods of analysis of cost.

The improvement in highway leads to reduction in vehicle operation cost, saving time, reduction in accident rate and increased comfort of passengers.