Why don’t I hear a beep from my EXpressToll® transponder like on E470?
Northwest Parkway has a different system than E470. When you go through our EXpressToll® lanes, the transponder will not beep. Eventually, transponders will not beep on Northwest Parkway or E470. This will help to extend the battery life of the transponders. Depending upon use, transponder batteries should last several years. Newer model transponders are equipped with replaceable batteries. All older model transponders will be replaced, when their batteries die, with the newer model.
