05293nas a2200481 a 4500 20260817163601.0 190926 2018h u th | tmt a eng |eng d .b1231531x AIT Thesis no.EV-18-26 Sasitorn Wongtongdee Assessment of idling emission at intersection and possible emission reduction measures by traffic management in Bangkok Pathum Thani, Thailand : Asian Institute of Technology, 2018 78 leaves : ill. + 1 online resource Thesis ; no. EV-18-26 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Environmental Engineering and ManagementExamination Committee:Dr. Ekbordin Winijkul(Chairperson)Prof. Nguyen Thi Kim OanhDr. Sohee MinsunKimNationality:ThaiPrevious Degree:Bachelor of Public Health in Environmental Health ScienceMahidol University, ThailandScholarship Donor:Thailand (HM Queen)Asian Institute of TechnologySchool of Environment, Resources and DevelopmentThailandMay 2018 Thesis (M. Sc.) - Asian Institute of Technology, 2018 Bangkok has had a traffic congestion problem causing from high traffic volumes, complex roads route and unprofessional traffic management, etc. When vehicles stop at the signalized intersection, the drivers always keep their vehicle{u2019}s engines running whichalso emit high level of exhaust pollutants. This study aimed at estimating CO and PM10concentration from traffic at the Saladeang intersection in Bangkok, Thailand, by using the CAL3QHC model which has algorithm to estimate queue length for different signal timings. The required inputs were traffic volume, types of vehicles, vehicle composition, meteorological conditions and emission factors. These data were required inputs to the model to estimate pollutant concentrations from traffic at the intersection. Running and idling emission factors of different vehicle emission control technologies were estimated by using vehicle emission testing data from the Thailand Automotive Emission Laboratory and pre-developed emission factors from the EMission FACtor (EMFAC). Others data were collected from the survey and video camera at the intersections. Outputs of the model were the concentration of CO and PM10from 6am-10pm on 7 weekdays and 6 weekends during December 2017 and February 2018. These output concentrations were compared with the monitoring data, and found that the Fractional Bias and Index of Agreement were in the acceptable ranges. Thus, the CAL3QHCcan be used to predict traffic CO and PM10concentration at the Saladaeng intersection.The CAL3QHC model was, then, used to estimate pollutant concentration reduction based on three scenarios in Thailand{u2019}s Transportation System Development Strategies; changing red signal timing, converting all buses to electrical buses, and allowing only eco-cars at the intersection. The model outputs showed that decreasing the red light phase length by 30% could decrease both CO and PM10concentration at the intersection by 19% and 9%, respectively. Changing all buses to electrical buses could reduce 30% of PM10concentrationfrom baseline while the reduction in CO concentration was much smaller since diesel buses did not significantly contribute to CO emission in baseline. However, highest reduction was observed when allowing only the vehicles with the highest emission control technologies at the intersection which 32% and 35% reduction in concentration of CO and PM10were estimated, respectively. Air quality management Bangkok (Thailand) Automobiles Motors Exhaust gas Bangkok (Thailand) Traffic engineering Ekbordin Winijkul, Chairperson Nguyen, Thi Kim Oanh, Examination Committee Kim, Sohee Minsun, Examination committee Thailand (HM Queen), Scholarship donor Asian Institute of Technology. Thesis ; no. EV-18-26 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B04590 .b1231531x mnait m 240422 0 190926 m a m 0 000:001:PDF:b1231531:004384:0:0:0:0:0:0 Click to view Abstract n mnait mnait mnarc mnarc 40 61 20 Barcode : 30050120877500 CREATED : 2019-06-24 RECORD # : i13196698 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : - CREATED : 2019-06-24 RECORD # : i13196704 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050120954598 CREATED : 2019-09-26 RECORD # : i1321875x LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050120954564 CREATED : 2019-09-26 RECORD # : i13218761 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 9168 9168 0 0 0 0 MAIN MAIN mnarc 2026-08-17 0 AIT Thesis no.EV-18-26 30050120877500 2026-08-17 16:36:01 2026-08-17 40 0 0 0 0 MAIN MAIN mnarc 2026-08-17 0 AIT Thesis no.EV-18-26 2026-08-17 16:36:01 2026-08-17 61 0 0 0 0 MAIN MAIN mnait 2026-08-17 50.00 0 AIT Thesis no.EV-18-26 30050120954598 2026-08-17 16:36:01 1 2026-08-17 20 0 0 0 0 MAIN MAIN mnait 2026-08-17 50.00 0 AIT Thesis no.EV-18-26 30050120954564 2026-08-17 16:36:01 2 2026-08-17 20