Evaluation of economic effectiveness of road construction and maintenance in the Czech Republic has been made for over 30 years by simpler methods of Czech origin, based also on the investors working costs flow and road users economy. The HDM - 4 system has been in use in the Czech Republic since the beginning of its distribution in 2000. The national systems were abandoned, because the has a broader approach to economic effectiveness evaluation and does not required any explanations when negotiating project financing with banks and government institutions (with was necessary when using a national system). Due to the density of road network and the financial requirements of its completion and rehabilitation the priority of individual projects cannot be determined seriously without economic evaluation. In the first phase we made the necessary calibration of input data. Subsequently, until the present, we have evaluated 35 motorway and road projects financed mostly from the state budget in co-operation with the European Investment Bank EIB. The calibration was made in accordance with programme instructions for the determination of long-term inputs i.e. the discount rate, vehicle fleet, time value, accident rate and maintenance. Other inputs are determined individually for individually for every individual project. The discount rate was determined with regard to the general financial environment in the Czech Republic, it was based on the interest of long-term debentures issued in the Czech Republic at 7%. The vehicle fleet consists of a number of vehicle types. Every selected type represents a vehicle class in the traffic stream. The ascertainment and selection of vehicle fleet representatives was based on statistical files of vehicle register kept by Police of the Czech Republic. The representatives were selected form 16 types of the most widely used and sold vehicles. Five categories of vehicle representatives were selected for the model - passenger cars, trucks (up to 3,5 t and 18 t), trucks with trailers and buses. Time value was determined in accordance with HDM - 4 methodology. A comparison of the results with the time value based and average wages achieved in the CR did not show any substantial differences. At present the time value derived from average wage in the CR is updated annually and compared with HDM - 4 methodology. Accidents and accident valuation are based on accident statistics, continuously kept and updated by the Police of the CR. These statistics cover all accidents the damage of which exceeds CZK 20 000. Minor accidents not investigated by the police are reported to insurance companies. The accident valuation is based on the data ascertained by the Police estimates, insurance companies and service organization, consequences of injuries, lost earnings and permanent consequences of injuries. The climatic conditions of the CR have been determined on the basis of national long-term statistical measurements. The required climate characteristics are determined for individual regions of the CR. The traffic data are based on national traffic counts in the road network on the basis of which the traffic stream characteristics for evaluation needs have been determined. Apart from the afore mentioned inputs further date are supplemented for every individual project, such as: technical studies incl. maps ; traffic data, incl. predictions ; Local traffic surveys (traffic stream structure, occupancy, quota of foreign vehicles) ; accident data ; data on road defects, road passports, progress of maintenance; surveys of existing state of road network influenced by the project, incl. Photographic documentation; investment costs and construction period ; in conclusion the paper presents the results of two evaluations by way of example. For the covering abstract see ITRD E135448.
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