Abstract
The Transport Operations Research Group (TORG), in collaboration with the Transport Research Laboratory (TRL), have established a test laboratory capable of monitoring the dynamic loading applied to road pavements by heavy goods vehicles. The following key conclusions have been formed: (a) The wheels of the test vehicles applied dynamic loading which oscillated at a frequency of approximately 3 Hz and appeared to be independent of speed, load, tyre type and suspension system; (b) Each of the axles of the test vehicles applied maximum and minimum dynamic loads at points of common chainage for a specific speed; (c) The ratio of mean dynamic axle-load and static axle-load increased with speed; (d) The dynamic-load coefficient appeared to have a local peak value between 50 and 80 km/h for the instrumented vehicle before increasing further with speed; (e) Relationships exist and have been developed between the dynamic load coefficient, road roughness and speed for each of the axles on the test vehicles; and (f) The implications of the results, which have been assessed for pavement design and the allocation of road track costs, are considerable. (A)
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