The authorities that run San Francisco's iconic Golden Gate Bridge announced that next year, they will remove the crossing's human toll takers and replace them with electronic sensors. The switch has been sold as a triumph for efficiency and traffic flow but is potential budget disaster for tourists who now risk stumbling into fines or having to pay more money for e-pass equipment. Cities and states across the world have been moving to sensor-based tolling systems, from TxTag in Texas to E-ZPass in 14 states, without regard to the burden it places on tourists who either don't understand the system,...