03218nam a2200385 a 4500 20260818090302.0 .b1019244x En AIT Thesis no.GT-81-33 Kuruwita, Sarathchandra Susantha Design of the no-passing zones for two-lane roads Bangkok : Asian Institute of Technology, 1982 iii, 56 p Thesis ; no. GT-81-33 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology Thesis (M. Eng.) - Asian Institute of Technology, 1982 For the sate execution of passing maneuvers, which would reduce the congestion of a road, gaps in the oncoming traffic stream should be greater than the time spent in the opposing lane by a passing driver, and the sight distance available should be greater than the minimum required. Incorrect judgement of gap size and substandard sight distance increase the risk of collision. Of the several methods employed by the highway authorities to reduce the risk of collisions, the most common method is the no-passing zones. The present study investigated the time spent in the opposing lane, the passing distance and passing sight distance needed for speeds in the range of 40 to 80 km/h. A brief study of accident rates was conducted to establish the minimum traffic flow at which the marking of no-passing zones would be justified. It was established in the present study, that the speed difference and the terrain affects the time spent in the opposing lane. It was further found that the present marking standards are adequate for the speeds observed. The minimum traffic flow at which the no-passing zones could be economically marked is 2000 veh/d. On the strength of the finding, it is recommended to extend the research with a more comprehensive study, particularly at higher speeds. The variation of the driver's height of eye and its effect on the passing sight distance is another aspect of study that is recommended. Finally, a thorough accident analysis be conducted, focusing upon the inadequacies of the present no-passing zone marking practice before changing the current stipulations. Roads Design Jones, John Hugh, Chairperson Prapansak Buranaprapa, Co-Chairperson Pichai Pamanikabud, Examination Committee Keidanren Foundation of Japan, Scholarship Donor Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B21253 .b1019244x mnait u 240910 2 951012 m a u 0 mnait mnarc 22 40 Barcode : 30050120656771 CREATED : 2014-01-04 RECORD # : i12784424 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050160070081 CREATED : 2016-05-17 RECORD # : i12980183 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 27536 27536 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no.GT-81-33 30050120656771 2026-08-18 09:03:02 3 2026-08-18 22 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no.GT-81-33 30050160070081 2026-08-18 09:03:02 1 2026-08-18 40