@article{oai:mie-u.repo.nii.ac.jp:00006324,
 author = {山崎, 忠久 and Yamazaki, Tadahisa},
 journal = {三重大學農學部學術報告 = The bulletin of the Faculty of Agriculture, Mie University},
 month = {Mar},
 note = {application/pdf, This is a report on the running speed of motor vehicles on the up-grade section of forest roads. The running speed varies with the condition of the road surface. From a standpoint of transportation efficiency on forest roads, the author discusses a speed difference between on gravel surface roads and on asphalt paved roads with the automobile performance diagram (theorectical value) and the results from a survey of the running speed (survey value). The main results are summarized as follows. (1) In general the running speed of motor vehicles on paved roads is higher than on gravel surface roads. But in the running speed of some types of vehicle, there was no speed difference between on gravel roads and on paved roads. It was found that the difference in the surveyed running speed of vehicles, except light buses, between on gravel roads and on paved roads is 40 - 50% of the difference in the theoretical speed. (2) Moreover, the difference in the running speed of motor trucks is greater at the gentle grade section than at the steep grade section. It is expected that the running speed ratio (the speed on paved roads/the speed on gravel roads) of motor trucks(4.5ton - 6.5ton) at the gentle grade section will be about 2 or more. (3) In improving the transportation efficiency,it is recommended to pave the forest roads with asphalt not only at the steep grade section but also at the gentle grade section.},
 pages = {29--38},
 title = {林道の上り勾配部の路面状態と自動車速度},
 volume = {64},
 year = {1982}
}