Among the many trends the pandemic accelerated, one of the least noted has been the increase in so-called cashless toll roads—highways where electronic fee-collection systems have replaced human toll collectors. Now, as traffic returns to pre-pandemic levels, another trend is plaguing these new systems: fare evasion. Around the country, turnpike authorities and bridge and tunnel operators are logging hundreds of millions of dollars in losses as scofflaws find increasingly inventive ways to outfox the systems. Though advocates say that the losses represent a small portion of total revenues, some officials are contemplating raising tolls to account for the shortfalls—in the...