Scott Griffin, an independent contractor with the city, has been in charge of installing the devices.
"They're called detectable warning devices (DWDs)," Griffin said. "Any type of sidewalk repair you have now, these new detectable warning devices go in. They're for the handicapped and for the visually impaired."
According to Griffin, the DWDs have raised bumps, similar to Braille and notify a handicapped person of their whereabouts.
"Basically, they can take their cane across them and it lets them know that they're at an intersection" Griffin said. "There is also directional lines to let you know which direction the traffic flow is coming from and which direction you should head."
Griffin said the DWDs are put in at a .12-inch slope, or less, which is an ADA requirement to allow those in wheelchairs access to the sidewalk.
At this time, the DWDs have been installed on Jackson Street, and most recently Vine and Pinckley Streets.
"I like to consider this a test phase to see how these go, and then hopefully in the future the city will continue to improve the sidewalk systems," Griffin said.