03187nam a2200409 a 4500 20260818094200.0 .b10213508 AIT Thesis no. GT- 80-30 Huang, Min-zen Drivers' response to the sign 'Sutthisan Road keep left' at Huey Kwang interchange, Princess Vipavadi Rangsit Highway, Thailand Bangkok : Asian Institute of Technology, 1981 59 p. Asian Institute of Technology. Thesis ; no. GT-80-30 Thesis ; no. GT-80-30 A thesis submitted in partial fulfilment of the requirements for the degree of Master of Engineering School of Engineering and Technology Thesis (M. Eng.) - Asian Institute of Technology, 1981 For the sake of finding the drivers' response to a highway sign react in g SUTTHISAN ROAD KE EP LEFT, installed 3 00 meters upstream from the northbound. exit ramp of the Huey kwang Interchange on the Princess Vipavadi Rangsity Highway, Bangkok, a before-and-after study was conducted. Two experimental signs of different dimensions were successively installed and tested. The traffic data were obtained by video-tape recording. Principal component analysis was used to find the main factors that describe the traffic characteristics. Canonical correlation analysis was then used to find the relationship between the sign-affected factors and the objective condition factors. The t-test was used to find the differences in traffic characteristics before and after the signs were installed. It was found that the higher the percentage of total volume being trucks or buses, the higher would be the erratic maneuver rate. The installation of the experimental signs significantly decreased this rate. The weather, and the size of the sign are other important factors that affect the drivers' response. The traffic volume, the days of the week, the time of day, and the exit traffic volume were found not to be important. Traffic signs and signals Thailand Vipawadi Rangsit Highway Jones, John Hugh, Chairperson Prapansak Burunaprapa, Co-Chairperson Yordphol Tanaboriboon, Examination Committee R.O.C Government, Scholarship Donor Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B21664 .b10213508 mnait u 250106 2 951012 m a u 0 mnait mnait mnarc 20 40 Barcode : 30050003639498 CREATED : 1995-10-13 RECORD # : i10258188 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050003010088 CREATED : 1995-10-13 RECORD # : i1025819x LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050160070453 CREATED : 2016-05-17 RECORD # : i12979545 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 31672 31672 0 0 0 0 MAIN MAIN mnait 2026-08-18 0 AIT Thesis no. GT- 80-30 30050003639498 2026-08-18 09:42:00 1 2026-08-18 20 0 0 0 0 MAIN MAIN mnait 2026-08-18 0 AIT Thesis no. GT- 80-30 30050003010088 2026-08-18 09:42:00 2 2026-08-18 20 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no. GT- 80-30 30050160070453 2026-08-18 09:42:00 1 2026-08-18 40