Purple pavement markings may be used to supplement lane line or edge line markings for:

Purple pavement markings are utilized to denote specific lane usage for electronic toll collection lanes, where they serve as a visual cue to drivers, indicating a lane designated for those using electronic methods to pay tolls. This color helps distinguish these lanes from other types of traffic lanes, enhancing clarity for drivers and improving traffic flow at toll facilities.

The use of purple markings helps facilitate a smoother transition into the electronic toll collection system, providing guidance to drivers on where they can take advantage of tolling efficiencies without stopping to pay manually. This designation helps minimize confusion, reduces potential delays at toll collection points, and encourages the use of electronic payment options, which can improve overall roadway efficiency.