“…Indeed, there is renewed academic interest in alternative road pricing mechanisms, such as congestion or GPS-based charging, cordon pricing, optimal toll pricing, real time road pricing, or "superblocks" of pedestrian-only traffic (see Parry et al, 2007;Guo et al, 2017;Cramton et al, 2018;Bjertnaes, 2019;Mueller et al, 2019). However, ideal externality-correcting mechanisms have not been widely implemented and most plans to introduce congestion charging are advancing slowly (Reid, 2019).…”