02329nam a2200241   450000500170000000800410001703500150005810000230007324501080009626000520020430000110025649000220026750001620028950200580045152012990050965000180180865000170182670000360184370000450187970000440192481000540196885600650202220260818095123.0251197         th                  eng    a.b102289251 aEmphasis, Billy E.10aEffect of transverse pavement markings on speed and deceleration of vehicles approaching a toll station  aBangkok :bAsian Institute of Technology,c1969  a116 p.1 aThesis ;vno. 239  aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in the Asian Institute of Technology, Bangkok, Thailand  aThesis (M.Eng.) - Asian Institute of Technology, 1969  aA study was made of the effect of unequally spaced transverse pavement markings on speed and deceleration of vehicles approaching a toll station on a rural highway in Thailand. These white stripes, of 0.50-meter width, were spaced so a vehicle travelling at 60 kph at 120 meters from the toll station, and decelerating uniformly to a stop at the station, would cross one line per second. Using a photographic technique to collect the data, observations were made before and after painting the transverse lines. To obtain an estimate of speed at specific distances from the toll gate, a regression curve was fitted to each run, using the method of least squares. From the least squares curve, the mean speed of vehicles before painting and after painting the stripes were obtained and statistically compared using the Students' t-test at the 5-percent significance level. One of the findings was a significant increase in the speed of passenger cars observed during daytime at distances farther than 100 meters from the toll station. This finding is a confirmation of results by others in experiments employing rumble strips. Among the more favorable effects of the transverse pavement markings was a significant reduction in the speeds of trucks and buses approaching the toll station at night. 0aRoad markings 0aTraffic flow1 aJones, John Hugh, eChairperson1 aDrew, Donald R., eExamination Committee1 aSubin Pinkayan, eExamination Committee2 aAsian Institute of Technology.tThesis ;vno. 239  3Full-Textuhttp://203.159.5.9/ait-thesis/detail.php?q=B24656