01902nam a2200241   450000500170000000800410001703500150005810000280007324500910010126000590019230000100025149000220026150200590028350001700034252007910051265000400130370000380134370000480138170000500142970000550147981000610153485600650159520260818094248.0191197         th                  eng    a.b102151280 aKrich Wongsantativanich10aDynamic legibility of Thai-character highway signs under a simulated driving condition  aBangkok :bSEATO Graduate School of Engineering,c1966  a56 p.1 aThesis ;vno. 128  aThesis (M.Eng.) - SEATO Graduate School of Engineering  aA thesis submitted in partial fulfillment if the requirements for the degree of Master of Engineering in the SEATO Graduate School of Engineering, Bangkok, Thailand.  aThis research was an attempt to study the effect of five selected variables on the legibility of Thai-character highway signs. The five variables comprised the height Of characters, width of characters, stroke width, character spacing, and line spacing. A dynamic legibility condition was simulated in the laboratory by projecting moving slides of Thai-character highway signs onto a cylindricalshaped screen. Volunteer subjects were tested whilst responding to simulated driving situations. The greatest effective distance at which each moving sign could be recognized by 85 percent of the subjects was taken as the dynamic legibility distance. Analyses of the consolidated data resulted in the most probable relationship between the five variables and the dynamic legibility distance. 0aTraffic signs and signalsxThailand1 aDr. John Hugh Jones,eChairperson1 aDr. Chai Muktabhant,eExamination committee1 aDr. Boonserm Weesakul,eExamination committee1 aDean Milton E. Bender, Jr.,eExamination committee2 aSEATO Graduate School of Engineering.tThesis ;vno. 128  3Full-Textuhttp://203.159.5.9/ait-thesis/detail.php?q=B23248