The Gopalakrishnan et al. (2015) introduction to a special issue in the journal Transport summarizes research on smart and sustainable transportation, providing us with a 'snapshot', at least from the mid 2010s, of some of the key areas of research and concerns about transportation technology. Part of the concerns are "the acceptability of ICT solutions and barriers to their implementation" (p. 246). What are some of your key concerns around ICT solutions to urban transportation issues, whether they are about the movement of people or the movement of goods? What are some key barriers to their implementation? Please give the citation and references too.