The New York State Fair offered E‑ZPass Plus as a payment option at two of its parking lots for the first time in 2007, and offered the service again for subsequent seasons. The service was administered by the New York State Thruway Authority (NYSTA), and motorists' E‑ZPass accounts were charged the same $5 parking fee that cash customers were charged. Unlike other E‑ZPass Plus implementations, the State Fair systems charged motorists at the parking lot entrances; drivers opting to pay by E‑ZPass Plus used dedicated "E‑ ZPass Plus Only" lanes. Since the lots only charge for parking during the twelve days of the State Fair, mobile, self-contained E-ZPass units were used to process vehicles. The units were mounted on trailers with a collapsible gantry for the E‑ZPass antennas, used a cellular wireless connection to send transactions to the NYSTA back-office system, and were powered by batteries that were kept replenished by photovoltaic solar panels, with a generator for backup.