If you see a 28-foot-high marijuana joint fashioned from a car on the side of the Courtyard Marriott at 934 16th Street, don’t be alarmed — or inspired. Part of a giant billboard installed today, the joint is just the latest ploy by the Colorado Department of Transportation to push its  Dangerous Combinations campaign.

The campaign, which launched in May, is part of the larger Drive High, Get a DUI program, and is designed to cut down on the number of people driving while high. Drive High, Get a DUI was established soon after Colorado legalized recreational marijuana; the first year of the program worked to educate people that they could get a DUI if they drove high.