Every year Salt Lake City puts new pro-environmental messages on its sanitation trucks

... for years I've argued more cities and counties should be doing this.  Here are there are some examples.

Some, including DC, have decorated some trucks with murals.

But mostly DC's sanitation trucks, and local government sanitation trucks miss the opportunity to use the potential of their rolling billboards.

Salt Lake City very consciously takes a different path, with messages on each side of the truck, and they change every year ("Truck Wraps Deliver Words of Wisdom, Inspire Recycling).

The for profit firm Waste Management does a good job with messages on their truck. But unlike SLC, the messages are pretty static, mostly about how the trucks run on gas generated from landfills. It is to the credit of SLC that they are willing to invest in the money required to change the messages every year.

And that they do is a good thing, because after awhile, you stop noticing messages when they don't change.

A typical DC trash truck

Most include a tagline, "DPW: The Preferred Choice" except that virtually everyone getting service from DPW doesn't have a choice.

Not that I am complaining, most of the time they do an excellent job, and I think it's a difficult one, especially given how hot it can be in the summer, and cold in the winter.