These conferences will provide excellent opportunities to the scientists, researchers, industrial engineers, and university students to present their research achievements and to develop new collaborations and partnerships with experts in the field. To encourage cross-discipline discussions and collaborations, participants are permitted to attend both conferences. Submissions in the form of extended abstracts, short papers, and full manuscripts are welcome. Due to a number of requests, we are pleased to announce that the paper submission deadline has been extended for the 6th International Conference on Civil, Structural and Transportation Engineering (ICCSTE’21) to March 26, 2021. Accordingly, the early-bird registration will now end on April 04, 2021.Please note that this is the final extension and the deadlines will not be extended any further. These conferences will be held Virtually, on May 17 - 19, 2021. Submissions in the form of extended abstracts, short papers, and full manuscripts are welcome.