Control Joint in Driveway
Here's a nice control joints located in a driveway. There is a
special trowel used to install this joint while the concrete slab is
being poured and finished.
These control joints help with expansion and contraction of the concrete as the weather goes from hot to cold and from wet to dry.
There are other forms of control joints you can use for any concrete walkways or driveways but these are the most inexpensive and last a long time.
This control joints is doing a nice job at keeping the cracks away from the rest of the driveway. The location of these control joints are critical and can make all the difference in whether or not you're concrete driveway will crack or even how much it will crack.