Trees

What do all four of these pictures have in common?

The answer, of course, is trees. 

Trees are a vital component of the interstate ecosystem, as they line pretty much all them, as can be seen clearly in these four diverse pictures, all of which have greenery surrounding the area. 

Not only do these trees provide essential noise dampening services, but they also give a nice continual backdrop that allows the millions of hours spent on the road to blur together into seemingly one easy journey. 

So next time you drive long distance, be sure to thank your local interstate lining trees, by driving past them without notice. It's what they were meant for.