02720nam a2200385 a 4500 20260818222109.0 .b10630107 En AIT Thesis no.GT-81-31 Sittichai Jullasing Speeds of vehicles for escape routes on downhill gradients Bangkok : Asian Institute of Technology, 1982 iv, 79 p Thesis ; no. GT-81-31 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 This research dealt with the speed of vehicles, especially heavy vehicles on downhill segments of two-lane rural highways. Field surveys were conducted on the 8-percent, 6-percent, 5-percent and 4-percent grades of the Saraburi-Lomsak highway and the Sarabuir-Nakorrachasima highway. An electronic stopwatch operated by a start-stop sequencer apparatus from two tape switches was the main apparatus. The study was especially concerned with the behavior of vehicles on various grades and possible locations of escape routes that should be provided for vehicles facing emergencies in downgrade movements. Speed-distance curves of four categories of vehicles on various grades were developed. It was found that vehicle speed increased substantially with distance travelled downhill on grades greater than 6 percent. An important factor which caused a reduction of downhill speed of vehicles was traffic congestion due to slow moving vehicles moving uphill. From the results of the study, it was recommended that for short, steep downgrades, an escape route should be provided at a location of 250 to 500 meters from the summit. Vehicles Speed Jones, John Hugh, Chairperson Prapansak Buranaprapa, Examination Committee Prinzl, Frediric, Examination Committee DAAD, Scholarship Donor Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B21251 .b10630107 mnait - 240909 2 951012 m a - 0 mnait mnarc 22 40 Barcode : 30050120656748 CREATED : 2014-01-04 RECORD # : i12784448 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050160070107 CREATED : 2016-05-17 RECORD # : i12980134 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 110956 110956 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no.GT-81-31 30050120656748 2026-08-18 22:21:09 3 2026-08-18 22 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no.GT-81-31 30050160070107 2026-08-18 22:21:09 1 2026-08-18 40