From Wazeopedia
====Clean Air Vehicle====
Clean Air Vehicles – '''future feature''' These vehicles meet the requirements for low emissions for the state that the person is operating the vehicle. The vehicles are normally either a hybrid or electric or natural gas vehicle. '''Note''' some states require special permits or license plates to qualify. States that have a decal to allow holders to use HOV lanes should be listed in the Transponder/Pass list.
===Toll attribute===