Cracked and buckling sidewalks are a problem in many communities, and replacing them can be costly. If cement is used as a replacement, there is the chance they will crack again.

Now dozens of cities are making the switch from cement to rubberized sidewalks.

Flexible panels are made out of recycled rubber, require little maintenance and allow trees to grow freely.

The only catch is cost. Making the switch is expensive -- about two to three times the cost of cement.

The price is beginning to drop and recycled rubber sidewalks are taking root in dozens of cities and communities around the country.

Washington, D.C. is testing the concept around some of its trees. And in the past few months, Baltimore has installed 40,000 square feet of the rubber panels.

To watch the video, please click the play icon in the video box to the right.