Protect employees from continual vehicle emissions inhalation. Headache, fatigue, flu-like effects, heart problems and other symptons related to carbon monoxide poisoning should be a concern at all quick serve ( drive-thru ) restaurants. Emission inhalation is a possible contributor to the restaurant industry's unusually high employee turnover. So next time you use the drive thru to get your "tall half calf double skinny vanilla latte no foam with chocolate sprinkles", don't let your vehile idle while your precious drink is being made. Better yet, it's faster if you walk into the restaurant ! Don't be lazy...employees ARE being poisoned at drive-thru windows !