“…In this context, unmanned electric transportation represents an excellent choice for city logistics. truck and drone delivery: one where the truck only serves as a mobile platform for launching and recovering the drone (Carlsson and Song 2017, Luo et al 2017, Yu et al 2018, Karak and Abdelghany 2019, Poikonen and Golden 2020, and a second system where the truck also serves customers (Murray and Chu 2015, Poikonen et al 2017, Wang et al 2017, Pugliese and Guerriero 2017, Schermer et al 2019a,b, Karak and Abdelghany 2019, Wang and Sheu 2019, Sacramento et al 2019, Poikonen et al 2019, Murray and Raj 2019.…”