The express lanes uses all-electronic tolling, with tolls payable with valid transponder (NC Quick Pass, E-ZPass, Peach Pass or SunPass) or Bill by mail, which uses automatic license plate recognition and charge a higher rate with additional fees. Toll rates are based on a congestion pricing, which means the tolls will fluctuate based on a number of factors, including congestion levels, time of day, and maintaining an average travel speed of 45 mph (70 km/h) or faster; toll rate changes may occur as frequently as every five minutes, though drivers will only pay the rate displayed when entering the express lanes.