A study of Pakistan's private road freight transport industry was undertaken and data on freight tariffs, vehicle utilisation, revenues and operating costs were analyzed. Over a period of four years it was found that average tariff levels closely followed the rate of inflation with a small marked seasonal variation depending on trip direction. Using multiple regressions analysis of cross-sectional data, tariffs were shown to be a function of trip distance, trip time, direction, vehicle type and load weight. Only in the comparison of extreme conditions was roughness found to provide some additional explanation of freight tariffs. Observed revenues and costs were compared with predictions of vehicle operating costs given by the World Bank's Highway Design and Maintenance Standards Model (HDM) and by the Transport Research Laboratory's Road Transport Investment Model (RTIM). The report supplements TRRL Research Reports 314 and 333 (IRRD 844064 and 846258). (A)

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