Darrell Sonntag joined the BYU Civil & Construction Engineering faculty in April 2022. For the previous 12 years, he conducted research and worked as an engineer at the US Environmental Protection Agency’s Office of Air Quality & Transportation. At the US EPA, his primary role was working with other engineers and scientists in developing a vehicle emissions model, the Motor Vehicle Emission Simulator (MOVES), used to estimate the air quality and greenhouse gas impacts of regulations and policies on vehicle emissions. At BYU, Darrell is conducting measurements of vehicle emissions and indoor air quality and modeling the environmental impacts of transportation systems.
Darrell is excited to join students at BYU in pursuit of truth through both science and faith. During his time as a BYU student, Darrell served in the Italy Rome Mission of the Church of Jesus Christ of Latter-day Saints from 2000-2002. He enjoys camping, hiking, biking, and cross-country skiing with his family.
Research Interests
Climate change and air quality impacts of transportation Vehicle emission measurements Vehicle emission models Air quality improvement strategies Indoor air quality Statistical and data science
Teaching Interests
Sustainability in civil and construction engineering Climate change and air quality impacts of transportation Environmental and transportation engineering Statistics and data science
Education
PhD, Civil and Environmental Engineering , Cornell University (2010)
Master of Science, Transportation Systems Engineering , Cornell University (2008)
Bachelor of Science, Civil Engineering , Brigham Young University (2005)
Professional Citizenship
Committee/Council Member, Air Quality: Science for Solutions Annual Conference (2025 - Present)
Officer, Great Basin Chapter of the Air and Waste Management Association (2024 - 2025)
Other, Utah Department of Transportation (2022 - 2023)
Reviewer, Ad Hoc Reviewer, US Environmental Protection Agency (2023 - 2023)
Other, US Environmental Protection Agency (2022 - 2023)
Courses Taught
Publications
James D JohnstonSeth Van RoosendaalJoseph WestHan JungDarrell B SonntagClaudia ToroDarrell B SonntagJesse BashGuy BurkeBenjamin N MurphyKarl M SeltzerHeather SimonMark W ShephardKaren E Cady-PereiraDarrell B SonntagHanyong JungRoyce P. HarlineTyler C. PetersonSelah E. WillisTaylor R. ChristensenJames D JohnstonBenjamin N. MurphyDarrell B SonntagKarl M. SeltzerHavala O. T. PyeChrstine AllenEvan MurrayClaudia ToroDrew R. GentnerCheng HuangShantanu JatharLi LiAndrew A. MayAllen L. RobinsonChen ZhangKaren FicenecAndrew KotzKenneth KellyDarrell B SonntagCarl FulperJessica BrakoraTiffany MoSudheer BallareClaudia ToroKristen FoleyHeather SimonBarron HendersonKirk R BakerAlison EythBrian TiminWyat AppelDeborah LueckenMegan BeardsleyDarrell B SonntagNorm PossielSarah Roberts
Presentations
Emma ReevesDane RichardsDarrell B Sonntag
Amber Gurecki AllenEmma ReevesDarrell B Sonntag
Amber Gurecki AllenDarrell B SonntagGary Bishop
Spencer LarsonAmber Gurecki AllenZachary DriskillSamuel SwindlerJake GatesMatthew R JonesDarrell B SonntagDale Reif Tree TreePhilip Brandon Lundrigan
Darrell B SonntagSpencer LarsonAmber Gurecki AllenZachary DriskillSamuel SwindlerJake GatesPhilip Brandon LundriganMatthew R JonesDale Reif Tree Tree
Amber Gurecki AllenEmma ReevesDarrell B Sonntag
Spencer LarsonAmber Gurecki AllenZachary DriskillSamuel SwindlerJake GatesMatthew R JonesDarrell B SonntagDale Reif Tree TreePhilip Brandon Lundrigan
Emma ReevesDane RichardsDarrell B Sonntag
James D JohnstonSeth VanRoosendaalJoseph WestHan JungDarrell B Sonntag
Darrell B SonntagHanyong JungRoyce Pablo HarlineTyler PetersonSelah WillisTaylor ChristensenJoseph WestSeth Van RoosendaalJames D Johnston
Darrell B SonntagAmber Allen
Amber AllenDarrell B Sonntag
Darrell B SonntagHanyong JungRoyce P. HarlineTyler C. PetersonSelah E. WillisJames D Johnston
Amber AllenBraxton PorterEllie MillsDarrell B Sonntag
Darrell B SonntagBraxton PorterAmber AllenEllie Mills
Darrell B Sonntag
Tyler ChristensenPaula ChanthakhounAlisandra OlivaresJames D JohnstonDarrell B Sonntag
Braedon TaroneSeth Van RoosendallJames D JohnstonDarrell B Sonntag
Pablo R. HarlineSelah E. WillisJames D JohnstonDarrell B Sonntag