มหาคชเสนีย์ชัย เ. et al. 2022. The Application of At-grade Roundabouts to Improve and Solve Traffic Problems on Highways Case study: Highway No. 34, Khlong Om Intersection, Chachoengsao Province; Highway No. 3, Nong Fab Intersection and PTT Intersection, Rayong Province and Highway . The 27th National Convention on Civil Engineering. 27, (Sep. 2022), TRL41–1.