  We illustrate that the electrification of our transport system might impose
unnecessary extra congestion and delay for daily commuting passengers. By
modelling travel behaviors of these passengers, it is found that more of them
tend to depart at a narrower peak-hour time window. The occurrence of this
shift is mainly caused by (1) the energy consumption of electric vehicles (EVs)
is much lower than that of traditional vehicles and (2) the energy consumption
of EVs is less sensitive to congestion than that of traditional vehicles. We
further examine the role of congestion toll in minimizing the extra congestion
and delay.
