AASHTO, a nonprofit association representing highway and transportation departments in all 50 states, as well as the District of Columbia, and Puerto Rico, released a new video in honor of Earth Day.

The American Association of State Highway and Transportation Officials released a new video to commemorate Earth Day and to showcase some of the remarkable ways state departments of transportation are making communities more livable and transportation systems more sustainable.

"Transportation represents the critical link between home, school, work, community and commerce," said Bud Wright, AASHTO executive director. "States are applying tremendous creativity and ingenuity to ensure that transportation systems enhance the world in which we live."

The Utah Department of Transportation's "Walking School Bus" is one of the innovative solutions featured in the video.