If you drive in unfamiliar areas often enough, you've probably run into situations where you couldn't spot a speed limit sign or were too busy finding your way to notice. However, Waze has some relief in sight: it just started rolling out an alert feature that makes it clear when you're breaking the speed limit on a given street. You can tell it whether or not to sound an alert, and even force the alert to show only when you run over the limit by a set percentage -- helpful for those fast-paced roads where obeying the limit actually makes you a hazard.